From c0d101bc0e1da5515502b322f516d7645f38dfc4 Mon Sep 17 00:00:00 2001
From: yizeyi18 <18586016708@163.com>
Date: Thu, 6 Jun 2024 21:23:21 +0800
Subject: [PATCH] update listings to catch up newest outputs and features of
 newest rust

---
 .../listing-02-01/Cargo.lock                  |   0
 .../listing-02-01/Cargo.toml                  |   0
 .../listing-02-01/src/main.rs                 |   2 +-
 .../listing-02-02/Cargo.lock                  |  16 +--
 .../listing-02-02/Cargo.toml                  |   0
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 .../listing-02-03/src/main.rs                 |   0
 .../listing-02-04/Cargo.lock                  |   0
 .../listing-02-04/Cargo.toml                  |   0
 .../listing-02-04/output.txt                  |   9 +-
 .../listing-02-04/src/main.rs                 |   0
 .../listing-02-05/Cargo.lock                  |   0
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 .../no-listing-01-cargo-new/output.txt        |   2 +-
 .../no-listing-01-cargo-new/src/main.rs       |   0
 .../no-listing-02-without-expect/Cargo.lock   |   0
 .../no-listing-02-without-expect/Cargo.toml   |   0
 .../no-listing-02-without-expect/output.txt   |  10 +-
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 .../Cargo.lock                                |   0
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 .../listing-03-02/output.txt                  |   2 +-
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 .../output.txt                                |   2 +-
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 .../no-listing-02-adding-mut/output.txt       |   2 +-
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 .../no-listing-03-shadowing/Cargo.lock        |   0
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 .../no-listing-03-shadowing/output.txt        |   2 +-
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 .../output.txt                                |   2 +-
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 .../no-listing-16-functions/Cargo.lock        |   0
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 .../no-listing-16-functions/output.txt        |   2 +-
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 .../Cargo.lock                                |   0
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 .../Cargo.lock                                |   0
 .../Cargo.toml                                |   0
 .../output.txt                                |  19 +--
 .../rustfmt-ignore                            |   0
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 .../output.txt                                |   2 +-
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 .../output.txt                                |   4 +-
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 .../no-listing-26-if-true/output.txt          |   2 +-
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 .../no-listing-30-else-if/output.txt          |   2 +-
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 .../no-listing-32-5-loop-labels/output.txt    |   2 +-
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 .../no-listing-32-loop/Cargo.lock             |   0
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 .../listing-04-06/output.txt                  |  11 +-
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 .../output.txt                                |  12 +-
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diff --git a/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.lock b/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.toml b/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-01/src/main.rs b/listings/ch02-guessing-game-tutorial/listing-02-01/src/main.rs
old mode 100755
new mode 100644
index d44e290..b822b89
--- a/listings/ch02-guessing-game-tutorial/listing-02-01/src/main.rs
+++ b/listings/ch02-guessing-game-tutorial/listing-02-01/src/main.rs
@@ -25,7 +25,7 @@ fn main() {
     // ANCHOR_END: expect
 
     // ANCHOR: print_guess
-    println!("You guessed: {guess}");
+    println!("You guessed: {}", guess);
     // ANCHOR_END: print_guess
 }
 // ANCHOR: all
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.lock b/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.lock
old mode 100755
new mode 100644
index edc2038..0fb52b3
--- a/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.lock
+++ b/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.lock
@@ -10,9 +10,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "getrandom"
-version = "0.2.7"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
+checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
 dependencies = [
  "cfg-if",
  "libc",
@@ -28,15 +28,15 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.127"
+version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "505e71a4706fa491e9b1b55f51b95d4037d0821ee40131190475f692b35b009b"
+checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
 [[package]]
 name = "ppv-lite86"
-version = "0.2.16"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "rand"
@@ -61,9 +61,9 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.6.3"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
  "getrandom",
 ]
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.toml b/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.toml
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old mode 100755
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diff --git a/listings/ch02-guessing-game-tutorial/listing-02-04/output.txt b/listings/ch02-guessing-game-tutorial/listing-02-04/output.txt
old mode 100755
new mode 100644
index 70a0c93..4a36350
--- a/listings/ch02-guessing-game-tutorial/listing-02-04/output.txt
+++ b/listings/ch02-guessing-game-tutorial/listing-02-04/output.txt
@@ -11,13 +11,14 @@ error[E0308]: mismatched types
   --> src/main.rs:22:21
    |
 22 |     match guess.cmp(&secret_number) {
-   |                 --- ^^^^^^^^^^^^^^ expected struct `String`, found integer
+   |                 --- ^^^^^^^^^^^^^^ expected `&String`, found `&{integer}`
    |                 |
-   |                 arguments to this function are incorrect
+   |                 arguments to this method are incorrect
    |
    = note: expected reference `&String`
               found reference `&{integer}`
-note: associated function defined here
+note: method defined here
+  --> /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library/core/src/cmp.rs:836:8
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `guessing_game` due to previous error
+error: could not compile `guessing_game` (bin "guessing_game") due to 1 previous error
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-04/src/main.rs b/listings/ch02-guessing-game-tutorial/listing-02-04/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.lock b/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.toml b/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-05/src/main.rs b/listings/ch02-guessing-game-tutorial/listing-02-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.lock b/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.toml b/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/listing-02-06/src/main.rs b/listings/ch02-guessing-game-tutorial/listing-02-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.lock b/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.toml b/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/output.txt b/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/output.txt
old mode 100755
new mode 100644
index 2724c14..33409e3
--- a/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/output.txt
+++ b/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
-    Finished dev [unoptimized + debuginfo] target(s) in 1.50s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.50s
      Running `target/debug/guessing_game`
 Hello, world!
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/src/main.rs b/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.lock b/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.toml b/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/output.txt b/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/output.txt
old mode 100755
new mode 100644
index 8095bbd..417d4e3
--- a/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/output.txt
+++ b/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/output.txt
@@ -4,10 +4,14 @@ warning: unused `Result` that must be used
   --> src/main.rs:10:5
    |
 10 |     io::stdin().read_line(&mut guess);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: `#[warn(unused_must_use)]` on by default
    = note: this `Result` may be an `Err` variant, which should be handled
+   = note: `#[warn(unused_must_use)]` on by default
+help: use `let _ = ...` to ignore the resulting value
+   |
+10 |     let _ = io::stdin().read_line(&mut guess);
+   |     +++++++
 
 warning: `guessing_game` (bin "guessing_game") generated 1 warning
-    Finished dev [unoptimized + debuginfo] target(s) in 0.59s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/src/main.rs b/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.lock b/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.toml b/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/src/main.rs b/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.lock b/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.toml b/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-04-looping/src/main.rs b/listings/ch02-guessing-game-tutorial/no-listing-04-looping/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.lock b/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.toml b/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/src/main.rs b/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-01/Cargo.lock b/listings/ch03-common-programming-concepts/listing-03-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-01/Cargo.toml b/listings/ch03-common-programming-concepts/listing-03-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-01/src/main.rs b/listings/ch03-common-programming-concepts/listing-03-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-02/Cargo.lock b/listings/ch03-common-programming-concepts/listing-03-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-02/Cargo.toml b/listings/ch03-common-programming-concepts/listing-03-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-02/output.txt b/listings/ch03-common-programming-concepts/listing-03-02/output.txt
old mode 100755
new mode 100644
index 3eb8d10..3b0deae
--- a/listings/ch03-common-programming-concepts/listing-03-02/output.txt
+++ b/listings/ch03-common-programming-concepts/listing-03-02/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling branches v0.1.0 (file:///projects/branches)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.30s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
      Running `target/debug/branches`
 The value of number is: 5
diff --git a/listings/ch03-common-programming-concepts/listing-03-02/src/main.rs b/listings/ch03-common-programming-concepts/listing-03-02/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-03/Cargo.lock b/listings/ch03-common-programming-concepts/listing-03-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-03/Cargo.toml b/listings/ch03-common-programming-concepts/listing-03-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-03/src/main.rs b/listings/ch03-common-programming-concepts/listing-03-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-04/Cargo.lock b/listings/ch03-common-programming-concepts/listing-03-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-04/Cargo.toml b/listings/ch03-common-programming-concepts/listing-03-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-04/output.txt b/listings/ch03-common-programming-concepts/listing-03-04/output.txt
old mode 100755
new mode 100644
index 35c0f80..82408ac
--- a/listings/ch03-common-programming-concepts/listing-03-04/output.txt
+++ b/listings/ch03-common-programming-concepts/listing-03-04/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling loops v0.1.0 (file:///projects/loops)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.32s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
      Running `target/debug/loops`
 the value is: 10
 the value is: 20
diff --git a/listings/ch03-common-programming-concepts/listing-03-04/src/main.rs b/listings/ch03-common-programming-concepts/listing-03-04/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-05/Cargo.lock b/listings/ch03-common-programming-concepts/listing-03-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-05/Cargo.toml b/listings/ch03-common-programming-concepts/listing-03-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/listing-03-05/src/main.rs b/listings/ch03-common-programming-concepts/listing-03-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/output.txt b/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/output.txt
old mode 100755
new mode 100644
index ed87cb2..73ca9d6
--- a/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/output.txt
@@ -13,4 +13,4 @@ error[E0384]: cannot assign twice to immutable variable `x`
   |     ^^^^^ cannot assign twice to immutable variable
 
 For more information about this error, try `rustc --explain E0384`.
-error: could not compile `variables` due to previous error
+error: could not compile `variables` (bin "variables") due to 1 previous error
diff --git a/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/output.txt b/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/output.txt
old mode 100755
new mode 100644
index 8ed6598..ed0c0c3
--- a/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling variables v0.1.0 (file:///projects/variables)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.30s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
      Running `target/debug/variables`
 The value of x is: 5
 The value of x is: 6
diff --git a/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-03-shadowing/output.txt b/listings/ch03-common-programming-concepts/no-listing-03-shadowing/output.txt
old mode 100755
new mode 100644
index f310e9f..6ff531b
--- a/listings/ch03-common-programming-concepts/no-listing-03-shadowing/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-03-shadowing/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling variables v0.1.0 (file:///projects/variables)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
      Running `target/debug/variables`
 The value of x in the inner scope is: 12
 The value of x is: 6
diff --git a/listings/ch03-common-programming-concepts/no-listing-03-shadowing/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-03-shadowing/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/output.txt b/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/output.txt
old mode 100755
new mode 100644
index 31a07ef..578a1f4
--- a/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/output.txt
@@ -9,4 +9,4 @@ error[E0308]: mismatched types
   |              ^^^^^^^^^^^^ expected `&str`, found `usize`
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `variables` due to previous error
+error: could not compile `variables` (bin "variables") due to 1 previous error
diff --git a/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-06-floating-point/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-06-floating-point/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-08-boolean/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-08-boolean/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-09-char/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-09-char/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-10-tuples/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-10-tuples/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-13-arrays/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-13-arrays/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-16-functions/output.txt b/listings/ch03-common-programming-concepts/no-listing-16-functions/output.txt
old mode 100755
new mode 100644
index 723fad3..898cf5f
--- a/listings/ch03-common-programming-concepts/no-listing-16-functions/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-16-functions/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling functions v0.1.0 (file:///projects/functions)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.28s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
      Running `target/debug/functions`
 Hello, world!
 Another function.
diff --git a/listings/ch03-common-programming-concepts/no-listing-16-functions/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-16-functions/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/output.txt b/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/output.txt
old mode 100755
new mode 100644
index 546bbc0..377f728
--- a/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling functions v0.1.0 (file:///projects/functions)
-    Finished dev [unoptimized + debuginfo] target(s) in 1.21s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.21s
      Running `target/debug/functions`
 The value of x is: 5
diff --git a/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/output.txt b/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/output.txt
old mode 100755
new mode 100644
index 6210234..91e71c1
--- a/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling functions v0.1.0 (file:///projects/functions)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
      Running `target/debug/functions`
 The measurement is: 5h
diff --git a/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt b/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt
old mode 100755
new mode 100644
index 6ae56e0..504fdd6
--- a/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt
@@ -5,22 +5,8 @@ error: expected expression, found `let` statement
   |
 2 |     let x = (let y = 6);
   |              ^^^
-
-error: expected expression, found statement (`let`)
- --> src/main.rs:2:14
   |
-2 |     let x = (let y = 6);
-  |              ^^^^^^^^^
-  |
-  = note: variable declaration using `let` is a statement
-
-error[E0658]: `let` expressions in this position are unstable
- --> src/main.rs:2:14
-  |
-2 |     let x = (let y = 6);
-  |              ^^^^^^^^^
-  |
-  = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
+  = note: only supported directly in conditions of `if` and `while` expressions
 
 warning: unnecessary parentheses around assigned value
  --> src/main.rs:2:13
@@ -35,6 +21,5 @@ help: remove these parentheses
 2 +     let x = let y = 6;
   |
 
-For more information about this error, try `rustc --explain E0658`.
 warning: `functions` (bin "functions") generated 1 warning
-error: could not compile `functions` due to 3 previous errors; 1 warning emitted
+error: could not compile `functions` (bin "functions") due to 1 previous error; 1 warning emitted
diff --git a/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/rustfmt-ignore b/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/output.txt b/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/output.txt
old mode 100755
new mode 100644
index a457e33..e66e4b9
--- a/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling functions v0.1.0 (file:///projects/functions)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.30s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
      Running `target/debug/functions`
 The value of x is: 5
diff --git a/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/output.txt b/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/output.txt
old mode 100755
new mode 100644
index c0484ea..18fdfd1
--- a/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/output.txt
@@ -8,7 +8,7 @@ error[E0308]: mismatched types
   |    |
   |    implicitly returns `()` as its body has no tail or `return` expression
 8 |     x + 1;
-  |          - help: remove this semicolon
+  |          - help: remove this semicolon to return this value
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `functions` due to previous error
+error: could not compile `functions` (bin "functions") due to 1 previous error
diff --git a/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-26-if-true/output.txt b/listings/ch03-common-programming-concepts/no-listing-26-if-true/output.txt
old mode 100755
new mode 100644
index 3d8c7dc..d39b3b5
--- a/listings/ch03-common-programming-concepts/no-listing-26-if-true/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-26-if-true/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling branches v0.1.0 (file:///projects/branches)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
      Running `target/debug/branches`
 condition was true
diff --git a/listings/ch03-common-programming-concepts/no-listing-26-if-true/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-26-if-true/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-27-if-false/output.txt b/listings/ch03-common-programming-concepts/no-listing-27-if-false/output.txt
old mode 100755
new mode 100644
index e40da96..3aa1e1c
--- a/listings/ch03-common-programming-concepts/no-listing-27-if-false/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-27-if-false/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling branches v0.1.0 (file:///projects/branches)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
      Running `target/debug/branches`
 condition was false
diff --git a/listings/ch03-common-programming-concepts/no-listing-27-if-false/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-27-if-false/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/output.txt b/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/output.txt
old mode 100755
new mode 100644
index 735bfe7..c9c0b0c
--- a/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/output.txt
@@ -7,4 +7,4 @@ error[E0308]: mismatched types
   |        ^^^^^^ expected `bool`, found integer
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `branches` due to previous error
+error: could not compile `branches` (bin "branches") due to 1 previous error
diff --git a/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-30-else-if/output.txt b/listings/ch03-common-programming-concepts/no-listing-30-else-if/output.txt
old mode 100755
new mode 100644
index b218941..d519524
--- a/listings/ch03-common-programming-concepts/no-listing-30-else-if/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-30-else-if/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling branches v0.1.0 (file:///projects/branches)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
      Running `target/debug/branches`
 number is divisible by 3
diff --git a/listings/ch03-common-programming-concepts/no-listing-30-else-if/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-30-else-if/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/output.txt b/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/output.txt
old mode 100755
new mode 100644
index e922acd..7fb857f
--- a/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/output.txt
@@ -9,4 +9,4 @@ error[E0308]: `if` and `else` have incompatible types
   |                                 expected because of this
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `branches` due to previous error
+error: could not compile `branches` (bin "branches") due to 1 previous error
diff --git a/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/output.txt b/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/output.txt
old mode 100755
new mode 100644
index d4d322f..4977b2b
--- a/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/output.txt
+++ b/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling loops v0.1.0 (file:///projects/loops)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.58s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.58s
      Running `target/debug/loops`
 count = 0
 remaining = 10
diff --git a/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-32-loop/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-32-loop/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.lock b/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.toml b/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/no-listing-34-for-range/src/main.rs b/listings/ch03-common-programming-concepts/no-listing-34-for-range/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.lock b/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.toml b/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/output.txt b/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/output.txt
old mode 100755
new mode 100644
index 8a11ccc..ee6a979
--- a/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/output.txt
+++ b/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/output.txt
@@ -1,15 +1,16 @@
 $ cargo build
    Compiling no_type_annotations v0.1.0 (file:///projects/no_type_annotations)
-error[E0282]: type annotations needed
+error[E0284]: type annotations needed
  --> src/main.rs:2:9
   |
 2 |     let guess = "42".parse().expect("Not a number!");
-  |         ^^^^^
+  |         ^^^^^        ----- type must be known at this point
   |
+  = note: cannot satisfy `<_ as FromStr>::Err == _`
 help: consider giving `guess` an explicit type
   |
-2 |     let guess: _ = "42".parse().expect("Not a number!");
-  |              +++
+2 |     let guess: /* Type */ = "42".parse().expect("Not a number!");
+  |              ++++++++++++
 
-For more information about this error, try `rustc --explain E0282`.
-error: could not compile `no_type_annotations` due to previous error
+For more information about this error, try `rustc --explain E0284`.
+error: could not compile `no_type_annotations` (bin "no_type_annotations") due to 1 previous error
diff --git a/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/src/main.rs b/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-01/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-01/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-01/rustfmt-ignore b/listings/ch04-understanding-ownership/listing-04-01/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-01/src/main.rs b/listings/ch04-understanding-ownership/listing-04-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-02/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-02/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-02/src/main.rs b/listings/ch04-understanding-ownership/listing-04-02/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-03/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-03/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-03/rustfmt-ignore b/listings/ch04-understanding-ownership/listing-04-03/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-03/src/main.rs b/listings/ch04-understanding-ownership/listing-04-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-04/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-04/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-04/rustfmt-ignore b/listings/ch04-understanding-ownership/listing-04-04/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-04/src/main.rs b/listings/ch04-understanding-ownership/listing-04-04/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-05/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-05/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-05/src/main.rs b/listings/ch04-understanding-ownership/listing-04-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-06/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-06/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-06/output.txt b/listings/ch04-understanding-ownership/listing-04-06/output.txt
old mode 100755
new mode 100644
index 1176f4e..c78cd5d
--- a/listings/ch04-understanding-ownership/listing-04-06/output.txt
+++ b/listings/ch04-understanding-ownership/listing-04-06/output.txt
@@ -3,10 +3,13 @@ $ cargo run
 error[E0596]: cannot borrow `*some_string` as mutable, as it is behind a `&` reference
  --> src/main.rs:8:5
   |
-7 | fn change(some_string: &String) {
-  |                        ------- help: consider changing this to be a mutable reference: `&mut String`
 8 |     some_string.push_str(", world");
-  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `some_string` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+  |     ^^^^^^^^^^^ `some_string` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+  |
+help: consider changing this to be a mutable reference
+  |
+7 | fn change(some_string: &mut String) {
+  |                         +++
 
 For more information about this error, try `rustc --explain E0596`.
-error: could not compile `ownership` due to previous error
+error: could not compile `ownership` (bin "ownership") due to 1 previous error
diff --git a/listings/ch04-understanding-ownership/listing-04-06/src/main.rs b/listings/ch04-understanding-ownership/listing-04-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-07/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-07/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-07/src/main.rs b/listings/ch04-understanding-ownership/listing-04-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-08/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-08/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-08/src/main.rs b/listings/ch04-understanding-ownership/listing-04-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-09/Cargo.lock b/listings/ch04-understanding-ownership/listing-04-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-09/Cargo.toml b/listings/ch04-understanding-ownership/listing-04-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/listing-04-09/src/main.rs b/listings/ch04-understanding-ownership/listing-04-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/src/main.rs b/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-02-string-scope/rustfmt-ignore b/listings/ch04-understanding-ownership/no-listing-02-string-scope/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-02-string-scope/src/main.rs b/listings/ch04-understanding-ownership/no-listing-02-string-scope/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-03-string-move/src/main.rs b/listings/ch04-understanding-ownership/no-listing-03-string-move/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/output.txt b/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/output.txt
old mode 100755
new mode 100644
index 05987f7..73e6115
--- a/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/output.txt
+++ b/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/output.txt
@@ -1,17 +1,21 @@
 $ cargo run
    Compiling ownership v0.1.0 (file:///projects/ownership)
 error[E0382]: borrow of moved value: `s1`
- --> src/main.rs:5:28
+ --> src/main.rs:5:15
   |
 2 |     let s1 = String::from("hello");
   |         -- move occurs because `s1` has type `String`, which does not implement the `Copy` trait
 3 |     let s2 = s1;
   |              -- value moved here
 4 |
-5 |     println!("{}, world!", s1);
-  |                            ^^ value borrowed here after move
+5 |     println!("{s1}, world!");
+  |               ^^^^ value borrowed here after move
   |
   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider cloning the value if the performance cost is acceptable
+  |
+3 |     let s2 = s1.clone();
+  |                ++++++++
 
 For more information about this error, try `rustc --explain E0382`.
-error: could not compile `ownership` due to previous error
+error: could not compile `ownership` (bin "ownership") due to 1 previous error
diff --git a/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/src/main.rs b/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/src/main.rs
old mode 100755
new mode 100644
index d0b9f18..e35f6d8
--- a/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/src/main.rs
+++ b/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/src/main.rs
@@ -3,6 +3,6 @@ fn main() {
     let s1 = String::from("hello");
     let s2 = s1;
 
-    println!("{}, world!", s1);
+    println!("{s1}, world!");
     // ANCHOR_END: here
 }
diff --git a/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-05-clone/src/main.rs b/listings/ch04-understanding-ownership/no-listing-05-clone/src/main.rs
old mode 100755
new mode 100644
index 4e61cc1..0b65e5f
--- a/listings/ch04-understanding-ownership/no-listing-05-clone/src/main.rs
+++ b/listings/ch04-understanding-ownership/no-listing-05-clone/src/main.rs
@@ -3,6 +3,6 @@ fn main() {
     let s1 = String::from("hello");
     let s2 = s1.clone();
 
-    println!("s1 = {}, s2 = {}", s1, s2);
+    println!("s1 = {s1}, s2 = {s2}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-06-copy/src/main.rs b/listings/ch04-understanding-ownership/no-listing-06-copy/src/main.rs
old mode 100755
new mode 100644
index 63a1fae..b6fd244
--- a/listings/ch04-understanding-ownership/no-listing-06-copy/src/main.rs
+++ b/listings/ch04-understanding-ownership/no-listing-06-copy/src/main.rs
@@ -3,6 +3,6 @@ fn main() {
     let x = 5;
     let y = x;
 
-    println!("x = {}, y = {}", x, y);
+    println!("x = {x}, y = {y}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-07-reference/src/main.rs b/listings/ch04-understanding-ownership/no-listing-07-reference/src/main.rs
old mode 100755
new mode 100644
index fd32a5f..6f6d5fb
--- a/listings/ch04-understanding-ownership/no-listing-07-reference/src/main.rs
+++ b/listings/ch04-understanding-ownership/no-listing-07-reference/src/main.rs
@@ -6,7 +6,7 @@ fn main() {
     let len = calculate_length(&s1);
     // ANCHOR_END: here
 
-    println!("The length of '{}' is {}.", s1, len);
+    println!("The length of '{s1}' is {len}.");
 }
 
 fn calculate_length(s: &String) -> usize {
diff --git a/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/rustfmt-ignore b/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/src/main.rs b/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/src/main.rs b/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/output.txt b/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/output.txt
old mode 100755
new mode 100644
index 8820d2d..97be4a2
--- a/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/output.txt
+++ b/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/output.txt
@@ -12,4 +12,4 @@ error[E0499]: cannot borrow `s` as mutable more than once at a time
   |                        -- first borrow later used here
 
 For more information about this error, try `rustc --explain E0499`.
-error: could not compile `ownership` due to previous error
+error: could not compile `ownership` (bin "ownership") due to 1 previous error
diff --git a/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/src/main.rs b/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/src/main.rs b/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/output.txt b/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/output.txt
old mode 100755
new mode 100644
index d1e9db2..4548823
--- a/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/output.txt
+++ b/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/output.txt
@@ -13,4 +13,4 @@ error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immuta
   |                                -- immutable borrow later used here
 
 For more information about this error, try `rustc --explain E0502`.
-error: could not compile `ownership` due to previous error
+error: could not compile `ownership` (bin "ownership") due to 1 previous error
diff --git a/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/src/main.rs b/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/src/main.rs b/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/output.txt b/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/output.txt
old mode 100755
new mode 100644
index b466a3d..0339433
--- a/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/output.txt
+++ b/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/output.txt
@@ -7,10 +7,22 @@ error[E0106]: missing lifetime specifier
   |                ^ expected named lifetime parameter
   |
   = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
-help: consider using the `'static` lifetime
+help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`
   |
 5 | fn dangle() -> &'static String {
   |                 +++++++
+help: instead, you are more likely to want to return an owned value
+  |
+5 - fn dangle() -> &String {
+5 + fn dangle() -> String {
+  |
 
-For more information about this error, try `rustc --explain E0106`.
-error: could not compile `ownership` due to previous error
+error[E0515]: cannot return reference to local variable `s`
+ --> src/main.rs:8:5
+  |
+8 |     &s
+  |     ^^ returns a reference to data owned by the current function
+
+Some errors have detailed explanations: E0106, E0515.
+For more information about an error, try `rustc --explain E0106`.
+error: could not compile `ownership` (bin "ownership") due to 2 previous errors
diff --git a/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/src/main.rs b/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/rustfmt-ignore b/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/src/main.rs b/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-16-no-dangle/src/main.rs b/listings/ch04-understanding-ownership/no-listing-16-no-dangle/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-17-slice/src/main.rs b/listings/ch04-understanding-ownership/no-listing-17-slice/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/src/main.rs b/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.lock b/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.toml b/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch04-understanding-ownership/no-listing-19-slice-error/output.txt b/listings/ch04-understanding-ownership/no-listing-19-slice-error/output.txt
old mode 100755
new mode 100644
index ab0c41f..c29ddf5
--- a/listings/ch04-understanding-ownership/no-listing-19-slice-error/output.txt
+++ b/listings/ch04-understanding-ownership/no-listing-19-slice-error/output.txt
@@ -9,8 +9,8 @@ error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immuta
 18 |     s.clear(); // error!
    |     ^^^^^^^^^ mutable borrow occurs here
 19 |
-20 |     println!("the first word is: {}", word);
-   |                                       ---- immutable borrow later used here
+20 |     println!("the first word is: {word}");
+   |                                  ------ immutable borrow later used here
 
 For more information about this error, try `rustc --explain E0502`.
-error: could not compile `ownership` due to previous error
+error: could not compile `ownership` (bin "ownership") due to 1 previous error
diff --git a/listings/ch04-understanding-ownership/no-listing-19-slice-error/src/main.rs b/listings/ch04-understanding-ownership/no-listing-19-slice-error/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.lock
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-01/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-01/src/main.rs
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.lock
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.toml
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-02/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-02/src/main.rs
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.lock
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.toml
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-03/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-03/src/main.rs
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.lock
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.toml
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-04/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-04/src/main.rs
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.lock
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.toml
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-05/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-05/src/main.rs
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.lock
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.toml
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-06/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-06/src/main.rs
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.lock
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-07/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-08/output.txt b/listings/ch05-using-structs-to-structure-related-data/listing-05-08/output.txt
old mode 100755
new mode 100644
index c44b582..79b8307
--- a/listings/ch05-using-structs-to-structure-related-data/listing-05-08/output.txt
+++ b/listings/ch05-using-structs-to-structure-related-data/listing-05-08/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling rectangles v0.1.0 (file:///projects/rectangles)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.42s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.42s
      Running `target/debug/rectangles`
 The area of the rectangle is 1500 square pixels.
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-08/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-09/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-10/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-11/output.txt b/listings/ch05-using-structs-to-structure-related-data/listing-05-11/output.txt
old mode 100755
new mode 100644
index 7d3bfcd..ee16972
--- a/listings/ch05-using-structs-to-structure-related-data/listing-05-11/output.txt
+++ b/listings/ch05-using-structs-to-structure-related-data/listing-05-11/output.txt
@@ -11,4 +11,4 @@ error[E0277]: `Rectangle` doesn't implement `std::fmt::Display`
    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `rectangles` due to previous error
+error: could not compile `rectangles` (bin "rectangles") due to 1 previous error
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-11/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-12/output.txt b/listings/ch05-using-structs-to-structure-related-data/listing-05-12/output.txt
old mode 100755
new mode 100644
index c37be6b..0c810b1
--- a/listings/ch05-using-structs-to-structure-related-data/listing-05-12/output.txt
+++ b/listings/ch05-using-structs-to-structure-related-data/listing-05-12/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling rectangles v0.1.0 (file:///projects/rectangles)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
      Running `target/debug/rectangles`
 rect1 is Rectangle { width: 30, height: 50 }
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-12/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-12/src/main.rs
old mode 100755
new mode 100644
index 2ffc4b8..67e0b92
--- a/listings/ch05-using-structs-to-structure-related-data/listing-05-12/src/main.rs
+++ b/listings/ch05-using-structs-to-structure-related-data/listing-05-12/src/main.rs
@@ -10,5 +10,5 @@ fn main() {
         height: 50,
     };
 
-    println!("rect1 is {:?}", rect1);
+    println!("rect1 is {rect1:?}");
 }
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.toml
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-13/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-13/src/main.rs
old mode 100755
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.lock
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.toml
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-14/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-14/src/main.rs
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.lock
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.toml
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-15/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-15/src/main.rs
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.lock
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diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/listing-05-16/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/listing-05-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/output.txt b/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/output.txt
old mode 100755
new mode 100644
index e28da59..5f9344c
--- a/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/output.txt
+++ b/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/output.txt
@@ -28,4 +28,4 @@ help: consider introducing a named lifetime parameter
   |
 
 For more information about this error, try `rustc --explain E0106`.
-error: could not compile `structs` due to 2 previous errors
+error: could not compile `structs` (bin "structs") due to 2 previous errors
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/output.txt b/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/output.txt
old mode 100755
new mode 100644
index 2685859..1c1f07d
--- a/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/output.txt
+++ b/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/output.txt
@@ -1,9 +1,9 @@
 $ cargo run
    Compiling rectangles v0.1.0 (file:///projects/rectangles)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.61s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s
      Running `target/debug/rectangles`
-[src/main.rs:10] 30 * scale = 60
-[src/main.rs:14] &rect1 = Rectangle {
+[src/main.rs:10:16] 30 * scale = 60
+[src/main.rs:14:5] &rect1 = Rectangle {
     width: 60,
     height: 50,
 }
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt b/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt
old mode 100755
new mode 100644
index 58cb842..71de1f7
--- a/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt
+++ b/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt
@@ -11,8 +11,9 @@ error[E0277]: `Rectangle` doesn't implement `Debug`
    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: consider annotating `Rectangle` with `#[derive(Debug)]`
    |
-1  | #[derive(Debug)]
+1  + #[derive(Debug)]
+2  | struct Rectangle {
    |
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `rectangles` due to previous error
+error: could not compile `rectangles` (bin "rectangles") due to 1 previous error
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.lock b/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.toml b/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/output.txt b/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/output.txt
old mode 100755
new mode 100644
index db6deed..4a6c5a9
--- a/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/output.txt
+++ b/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling rectangles v0.1.0 (file:///projects/rectangles)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
      Running `target/debug/rectangles`
 rect1 is Rectangle {
     width: 30,
diff --git a/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/src/main.rs b/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/src/main.rs
old mode 100755
new mode 100644
index 84e32ae..f763b50
--- a/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/src/main.rs
+++ b/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/src/main.rs
@@ -10,5 +10,5 @@ fn main() {
         height: 50,
     };
 
-    println!("rect1 is {:#?}", rect1);
+    println!("rect1 is {rect1:#?}");
 }
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.lock b/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.toml b/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-01/src/main.rs b/listings/ch06-enums-and-pattern-matching/listing-06-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.lock b/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.toml b/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-02/src/main.rs b/listings/ch06-enums-and-pattern-matching/listing-06-02/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.lock b/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.toml b/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-03/src/main.rs b/listings/ch06-enums-and-pattern-matching/listing-06-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.lock b/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.toml b/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-04/src/main.rs b/listings/ch06-enums-and-pattern-matching/listing-06-04/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.lock b/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.toml b/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-05/src/main.rs b/listings/ch06-enums-and-pattern-matching/listing-06-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.lock b/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.toml b/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs b/listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs
old mode 100755
new mode 100644
index dc2bffb..0a03751
--- a/listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs
+++ b/listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs
@@ -2,7 +2,7 @@ fn main() {
     // ANCHOR: here
     let config_max = Some(3u8);
     match config_max {
-        Some(max) => println!("The maximum is configured to be {}", max),
+        Some(max) => println!("The maximum is configured to be {max}"),
         _ => (),
     }
     // ANCHOR_END: here
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt b/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt
old mode 100755
new mode 100644
index d4a040e..fa202e6
--- a/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt
+++ b/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt
@@ -8,15 +8,10 @@ error[E0277]: cannot add `Option<i8>` to `i8`
   |
   = help: the trait `Add<Option<i8>>` is not implemented for `i8`
   = help: the following other types implement trait `Add<Rhs>`:
-            <&'a f32 as Add<f32>>
-            <&'a f64 as Add<f64>>
-            <&'a i128 as Add<i128>>
-            <&'a i16 as Add<i16>>
-            <&'a i32 as Add<i32>>
-            <&'a i64 as Add<i64>>
+            <i8 as Add>
+            <i8 as Add<&i8>>
             <&'a i8 as Add<i8>>
-            <&'a isize as Add<isize>>
-          and 48 others
+            <&i8 as Add<&i8>>
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `enums` due to previous error
+error: could not compile `enums` (bin "enums") due to 1 previous error
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/src/main.rs
old mode 100755
new mode 100644
index a4d500c..298215d
--- a/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/src/main.rs
+++ b/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/src/main.rs
@@ -19,7 +19,7 @@ fn value_in_cents(coin: Coin) -> u8 {
         Coin::Nickel => 5,
         Coin::Dime => 10,
         Coin::Quarter(state) => {
-            println!("State quarter from {:?}!", state);
+            println!("State quarter from {state:?}!");
             25
         }
     }
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt b/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt
old mode 100755
new mode 100644
index bec7284..7d9a661
--- a/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt
+++ b/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt
@@ -7,6 +7,10 @@ error[E0004]: non-exhaustive patterns: `None` not covered
   |               ^ pattern `None` not covered
   |
 note: `Option<i32>` defined here
+ --> /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library/core/src/option.rs:572:1
+ ::: /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library/core/src/option.rs:576:5
+  |
+  = note: not covered
   = note: the matched value is of type `Option<i32>`
 help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
   |
@@ -15,4 +19,4 @@ help: ensure that all possible cases are being handled by adding a match arm wit
   |
 
 For more information about this error, try `rustc --explain E0004`.
-error: could not compile `enums` due to previous error
+error: could not compile `enums` (bin "enums") due to 1 previous error
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs
old mode 100755
new mode 100644
index 735086d..7d7254e
--- a/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs
+++ b/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs
@@ -2,7 +2,7 @@ fn main() {
     // ANCHOR: here
     let config_max = Some(3u8);
     if let Some(max) = config_max {
-        println!("The maximum is configured to be {}", max);
+        println!("The maximum is configured to be {max}");
     }
     // ANCHOR_END: here
 }
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs
old mode 100755
new mode 100644
index 12c4c0f..d0d7d80
--- a/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs
+++ b/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs
@@ -17,7 +17,7 @@ fn main() {
     // ANCHOR: here
     let mut count = 0;
     match coin {
-        Coin::Quarter(state) => println!("State quarter from {:?}!", state),
+        Coin::Quarter(state) => println!("State quarter from {state:?}!"),
         _ => count += 1,
     }
     // ANCHOR_END: here
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs
old mode 100755
new mode 100644
index ba7eda2..3bb3630
--- a/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs
+++ b/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs
@@ -17,7 +17,7 @@ fn main() {
     // ANCHOR: here
     let mut count = 0;
     if let Coin::Quarter(state) = coin {
-        println!("State quarter from {:?}!", state);
+        println!("State quarter from {state:?}!");
     } else {
         count += 1;
     }
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.lock b/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.toml b/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/src/main.rs b/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-01/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-01/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-01/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-01/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-03/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-03/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-03/output.txt b/listings/ch07-managing-growing-projects/listing-07-03/output.txt
old mode 100755
new mode 100644
index 481dcb3..2d06c7f
--- a/listings/ch07-managing-growing-projects/listing-07-03/output.txt
+++ b/listings/ch07-managing-growing-projects/listing-07-03/output.txt
@@ -4,7 +4,9 @@ error[E0603]: module `hosting` is private
  --> src/lib.rs:9:28
   |
 9 |     crate::front_of_house::hosting::add_to_waitlist();
-  |                            ^^^^^^^ private module
+  |                            ^^^^^^^  --------------- function `add_to_waitlist` is not publicly re-exported
+  |                            |
+  |                            private module
   |
 note: the module `hosting` is defined here
  --> src/lib.rs:2:5
@@ -16,7 +18,9 @@ error[E0603]: module `hosting` is private
   --> src/lib.rs:12:21
    |
 12 |     front_of_house::hosting::add_to_waitlist();
-   |                     ^^^^^^^ private module
+   |                     ^^^^^^^  --------------- function `add_to_waitlist` is not publicly re-exported
+   |                     |
+   |                     private module
    |
 note: the module `hosting` is defined here
   --> src/lib.rs:2:5
@@ -25,4 +29,4 @@ note: the module `hosting` is defined here
    |     ^^^^^^^^^^^
 
 For more information about this error, try `rustc --explain E0603`.
-error: could not compile `restaurant` due to 2 previous errors
+error: could not compile `restaurant` (lib) due to 2 previous errors
diff --git a/listings/ch07-managing-growing-projects/listing-07-03/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-03/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-05/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-05/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-05/output.txt b/listings/ch07-managing-growing-projects/listing-07-05/output.txt
old mode 100755
new mode 100644
index 63eb89a..98d8d6e
--- a/listings/ch07-managing-growing-projects/listing-07-05/output.txt
+++ b/listings/ch07-managing-growing-projects/listing-07-05/output.txt
@@ -25,4 +25,4 @@ note: the function `add_to_waitlist` is defined here
    |         ^^^^^^^^^^^^^^^^^^^^
 
 For more information about this error, try `rustc --explain E0603`.
-error: could not compile `restaurant` due to 2 previous errors
+error: could not compile `restaurant` (lib) due to 2 previous errors
diff --git a/listings/ch07-managing-growing-projects/listing-07-05/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-05/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-07/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-07/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-07/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-07/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-08/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-08/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-08/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-08/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-09/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-09/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-09/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-09/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-10/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-10/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-10/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-10/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-11/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-11/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-11/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-11/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-12/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-12/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-12/output.txt b/listings/ch07-managing-growing-projects/listing-07-12/output.txt
old mode 100755
new mode 100644
index 39b6505..0eda253
--- a/listings/ch07-managing-growing-projects/listing-07-12/output.txt
+++ b/listings/ch07-managing-growing-projects/listing-07-12/output.txt
@@ -5,6 +5,11 @@ error[E0433]: failed to resolve: use of undeclared crate or module `hosting`
    |
 11 |         hosting::add_to_waitlist();
    |         ^^^^^^^ use of undeclared crate or module `hosting`
+   |
+help: consider importing this module through its public re-export
+   |
+10 +     use crate::hosting;
+   |
 
 warning: unused import: `crate::front_of_house::hosting`
  --> src/lib.rs:7:5
@@ -16,4 +21,4 @@ warning: unused import: `crate::front_of_house::hosting`
 
 For more information about this error, try `rustc --explain E0433`.
 warning: `restaurant` (lib) generated 1 warning
-error: could not compile `restaurant` due to previous error; 1 warning emitted
+error: could not compile `restaurant` (lib) due to 1 previous error; 1 warning emitted
diff --git a/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-13/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-13/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-13/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-14/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-14/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-14/src/main.rs b/listings/ch07-managing-growing-projects/listing-07-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-15/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-15/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-15/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-15/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-16/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-16/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-16/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-16/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-17/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-17/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-17/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-17/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-18/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-18/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-18/src/main.rs b/listings/ch07-managing-growing-projects/listing-07-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-19/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-19/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-19/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-19/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-20/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-20/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-20/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-20/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.lock b/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.toml b/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/front_of_house.rs b/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/front_of_house.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/lib.rs b/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.lock b/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.toml b/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/src/main.rs b/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.lock b/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.toml b/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house.rs b/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house/hosting.rs b/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house/hosting.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/lib.rs b/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.lock b/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.toml b/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/quick-reference-example/output.txt b/listings/ch07-managing-growing-projects/quick-reference-example/output.txt
old mode 100755
new mode 100644
index e36a45e..04ac6f6
--- a/listings/ch07-managing-growing-projects/quick-reference-example/output.txt
+++ b/listings/ch07-managing-growing-projects/quick-reference-example/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling backyard v0.1.0 (file:///projects/backyard)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.36s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
      Running `target/debug/backyard`
 I'm growing Asparagus!
diff --git a/listings/ch07-managing-growing-projects/quick-reference-example/src/garden.rs b/listings/ch07-managing-growing-projects/quick-reference-example/src/garden.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/quick-reference-example/src/garden/vegetables.rs b/listings/ch07-managing-growing-projects/quick-reference-example/src/garden/vegetables.rs
old mode 100755
new mode 100644
diff --git a/listings/ch07-managing-growing-projects/quick-reference-example/src/main.rs b/listings/ch07-managing-growing-projects/quick-reference-example/src/main.rs
old mode 100755
new mode 100644
index 7a024a9..0d9a0ca
--- a/listings/ch07-managing-growing-projects/quick-reference-example/src/main.rs
+++ b/listings/ch07-managing-growing-projects/quick-reference-example/src/main.rs
@@ -4,5 +4,5 @@ pub mod garden;
 
 fn main() {
     let plant = Asparagus {};
-    println!("I'm growing {:?}!", plant);
+    println!("I'm growing {plant:?}!");
 }
diff --git a/listings/ch08-common-collections/listing-08-01/Cargo.lock b/listings/ch08-common-collections/listing-08-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-01/Cargo.toml b/listings/ch08-common-collections/listing-08-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-01/src/main.rs b/listings/ch08-common-collections/listing-08-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-02/Cargo.lock b/listings/ch08-common-collections/listing-08-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-02/Cargo.toml b/listings/ch08-common-collections/listing-08-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-02/src/main.rs b/listings/ch08-common-collections/listing-08-02/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-03/Cargo.lock b/listings/ch08-common-collections/listing-08-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-03/Cargo.toml b/listings/ch08-common-collections/listing-08-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-03/src/main.rs b/listings/ch08-common-collections/listing-08-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-04/Cargo.lock b/listings/ch08-common-collections/listing-08-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-04/Cargo.toml b/listings/ch08-common-collections/listing-08-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-04/src/main.rs b/listings/ch08-common-collections/listing-08-04/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-05/Cargo.lock b/listings/ch08-common-collections/listing-08-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-05/Cargo.toml b/listings/ch08-common-collections/listing-08-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-05/src/main.rs b/listings/ch08-common-collections/listing-08-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-06/Cargo.lock b/listings/ch08-common-collections/listing-08-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-06/Cargo.toml b/listings/ch08-common-collections/listing-08-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-06/output.txt b/listings/ch08-common-collections/listing-08-06/output.txt
old mode 100755
new mode 100644
index 3104205..f98ab1c
--- a/listings/ch08-common-collections/listing-08-06/output.txt
+++ b/listings/ch08-common-collections/listing-08-06/output.txt
@@ -10,7 +10,7 @@ error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immuta
   |     ^^^^^^^^^ mutable borrow occurs here
 7 |
 8 |     println!("The first element is: {first}");
-  |                                      ----- immutable borrow later used here
+  |                                     ------- immutable borrow later used here
 
 For more information about this error, try `rustc --explain E0502`.
-error: could not compile `collections` due to previous error
+error: could not compile `collections` (bin "collections") due to 1 previous error
diff --git a/listings/ch08-common-collections/listing-08-06/src/main.rs b/listings/ch08-common-collections/listing-08-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-07/Cargo.lock b/listings/ch08-common-collections/listing-08-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-07/Cargo.toml b/listings/ch08-common-collections/listing-08-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-07/output.txt b/listings/ch08-common-collections/listing-08-07/output.txt
deleted file mode 100755
index ab512a9..0000000
--- a/listings/ch08-common-collections/listing-08-07/output.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-$ cargo run
-   Compiling collections v0.1.0 (file:///projects/collections)
-error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
- --> src/main.rs:6:5
-  |
-4 |     let first = &v[0];
-  |                  - immutable borrow occurs here
-5 | 
-6 |     v.push(6);
-  |     ^^^^^^^^^ mutable borrow occurs here
-7 | 
-8 |     println!("The first element is: {}", first);
-  |                                          ----- immutable borrow later used here
-
-For more information about this error, try `rustc --explain E0502`.
-error: could not compile `collections` due to previous error
diff --git a/listings/ch08-common-collections/listing-08-07/src/main.rs b/listings/ch08-common-collections/listing-08-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-08/Cargo.lock b/listings/ch08-common-collections/listing-08-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-08/Cargo.toml b/listings/ch08-common-collections/listing-08-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-08/src/main.rs b/listings/ch08-common-collections/listing-08-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-09/Cargo.lock b/listings/ch08-common-collections/listing-08-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-09/Cargo.toml b/listings/ch08-common-collections/listing-08-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-09/src/main.rs b/listings/ch08-common-collections/listing-08-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-10/Cargo.lock b/listings/ch08-common-collections/listing-08-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-10/Cargo.toml b/listings/ch08-common-collections/listing-08-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-10/src/main.rs b/listings/ch08-common-collections/listing-08-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-11/Cargo.lock b/listings/ch08-common-collections/listing-08-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-11/Cargo.toml b/listings/ch08-common-collections/listing-08-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-11/src/main.rs b/listings/ch08-common-collections/listing-08-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-12/Cargo.lock b/listings/ch08-common-collections/listing-08-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-12/Cargo.toml b/listings/ch08-common-collections/listing-08-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-12/src/main.rs b/listings/ch08-common-collections/listing-08-12/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-13/Cargo.lock b/listings/ch08-common-collections/listing-08-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-13/Cargo.toml b/listings/ch08-common-collections/listing-08-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-13/src/main.rs b/listings/ch08-common-collections/listing-08-13/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-14/Cargo.lock b/listings/ch08-common-collections/listing-08-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-14/Cargo.toml b/listings/ch08-common-collections/listing-08-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-14/src/main.rs b/listings/ch08-common-collections/listing-08-14/src/main.rs
old mode 100755
new mode 100644
index f701fd5..bf737ab
--- a/listings/ch08-common-collections/listing-08-14/src/main.rs
+++ b/listings/ch08-common-collections/listing-08-14/src/main.rs
@@ -3,7 +3,7 @@ fn main() {
     let hello = String::from("السلام عليكم");
     let hello = String::from("Dobrý den");
     let hello = String::from("Hello");
-    let hello = String::from("שָׁלוֹם");
+    let hello = String::from("שלום");
     let hello = String::from("नमस्ते");
     let hello = String::from("こんにちは");
     let hello = String::from("안녕하세요");
diff --git a/listings/ch08-common-collections/listing-08-15/Cargo.lock b/listings/ch08-common-collections/listing-08-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-15/Cargo.toml b/listings/ch08-common-collections/listing-08-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-15/src/main.rs b/listings/ch08-common-collections/listing-08-15/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-16/Cargo.lock b/listings/ch08-common-collections/listing-08-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-16/Cargo.toml b/listings/ch08-common-collections/listing-08-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-16/src/main.rs b/listings/ch08-common-collections/listing-08-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-17/Cargo.lock b/listings/ch08-common-collections/listing-08-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-17/Cargo.toml b/listings/ch08-common-collections/listing-08-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-17/src/main.rs b/listings/ch08-common-collections/listing-08-17/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-18/Cargo.lock b/listings/ch08-common-collections/listing-08-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-18/Cargo.toml b/listings/ch08-common-collections/listing-08-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-18/src/main.rs b/listings/ch08-common-collections/listing-08-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-19/Cargo.lock b/listings/ch08-common-collections/listing-08-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-19/Cargo.toml b/listings/ch08-common-collections/listing-08-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-19/output.txt b/listings/ch08-common-collections/listing-08-19/output.txt
old mode 100755
new mode 100644
index 9557777..75d9a56
--- a/listings/ch08-common-collections/listing-08-19/output.txt
+++ b/listings/ch08-common-collections/listing-08-19/output.txt
@@ -1,20 +1,17 @@
 $ cargo run
    Compiling collections v0.1.0 (file:///projects/collections)
-error[E0277]: the type `String` cannot be indexed by `{integer}`
- --> src/main.rs:3:13
+error[E0277]: the type `str` cannot be indexed by `{integer}`
+ --> src/main.rs:3:16
   |
 3 |     let h = s1[0];
-  |             ^^^^^ `String` cannot be indexed by `{integer}`
+  |                ^ string indices are ranges of `usize`
   |
-  = help: the trait `Index<{integer}>` is not implemented for `String`
-  = help: the following other types implement trait `Index<Idx>`:
-            <String as Index<RangeFrom<usize>>>
-            <String as Index<RangeFull>>
-            <String as Index<RangeInclusive<usize>>>
-            <String as Index<RangeTo<usize>>>
-            <String as Index<RangeToInclusive<usize>>>
-            <String as Index<std::ops::Range<usize>>>
-            <str as Index<I>>
+  = help: the trait `SliceIndex<str>` is not implemented for `{integer}`, which is required by `String: Index<_>`
+  = note: you can use `.chars().nth()` or `.bytes().nth()`
+          for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
+  = help: the trait `SliceIndex<[_]>` is implemented for `usize`
+  = help: for that trait implementation, expected `[_]`, found `str`
+  = note: required for `String` to implement `Index<{integer}>`
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `collections` due to previous error
+error: could not compile `collections` (bin "collections") due to 1 previous error
diff --git a/listings/ch08-common-collections/listing-08-19/src/main.rs b/listings/ch08-common-collections/listing-08-19/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-20/Cargo.lock b/listings/ch08-common-collections/listing-08-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-20/Cargo.toml b/listings/ch08-common-collections/listing-08-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-20/src/main.rs b/listings/ch08-common-collections/listing-08-20/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-21/Cargo.lock b/listings/ch08-common-collections/listing-08-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-21/Cargo.toml b/listings/ch08-common-collections/listing-08-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-21/src/main.rs b/listings/ch08-common-collections/listing-08-21/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-22/Cargo.lock b/listings/ch08-common-collections/listing-08-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-22/Cargo.toml b/listings/ch08-common-collections/listing-08-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-22/src/main.rs b/listings/ch08-common-collections/listing-08-22/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-23/Cargo.lock b/listings/ch08-common-collections/listing-08-23/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-23/Cargo.toml b/listings/ch08-common-collections/listing-08-23/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-23/src/main.rs b/listings/ch08-common-collections/listing-08-23/src/main.rs
old mode 100755
new mode 100644
index e8684cf..29025b4
--- a/listings/ch08-common-collections/listing-08-23/src/main.rs
+++ b/listings/ch08-common-collections/listing-08-23/src/main.rs
@@ -7,6 +7,6 @@ fn main() {
     scores.insert(String::from("Blue"), 10);
     scores.insert(String::from("Blue"), 25);
 
-    println!("{:?}", scores);
+    println!("{scores:?}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch08-common-collections/listing-08-24/Cargo.lock b/listings/ch08-common-collections/listing-08-24/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-24/Cargo.toml b/listings/ch08-common-collections/listing-08-24/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-24/src/main.rs b/listings/ch08-common-collections/listing-08-24/src/main.rs
old mode 100755
new mode 100644
index 3ad97b5..0138956
--- a/listings/ch08-common-collections/listing-08-24/src/main.rs
+++ b/listings/ch08-common-collections/listing-08-24/src/main.rs
@@ -8,6 +8,6 @@ fn main() {
     scores.entry(String::from("Yellow")).or_insert(50);
     scores.entry(String::from("Blue")).or_insert(50);
 
-    println!("{:?}", scores);
+    println!("{scores:?}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch08-common-collections/listing-08-25/Cargo.lock b/listings/ch08-common-collections/listing-08-25/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-25/Cargo.toml b/listings/ch08-common-collections/listing-08-25/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/listing-08-25/src/main.rs b/listings/ch08-common-collections/listing-08-25/src/main.rs
old mode 100755
new mode 100644
index f3f6aa1..84dd1cd
--- a/listings/ch08-common-collections/listing-08-25/src/main.rs
+++ b/listings/ch08-common-collections/listing-08-25/src/main.rs
@@ -11,6 +11,6 @@ fn main() {
         *count += 1;
     }
 
-    println!("{:?}", map);
+    println!("{map:?}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch08-common-collections/listing-08-26/Cargo.lock b/listings/ch08-common-collections/listing-08-26/Cargo.lock
deleted file mode 100755
index d3daeff..0000000
--- a/listings/ch08-common-collections/listing-08-26/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "collections"
-version = "0.1.0"
-
diff --git a/listings/ch08-common-collections/listing-08-26/Cargo.toml b/listings/ch08-common-collections/listing-08-26/Cargo.toml
deleted file mode 100755
index fe49598..0000000
--- a/listings/ch08-common-collections/listing-08-26/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "collections"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch08-common-collections/listing-08-26/src/main.rs b/listings/ch08-common-collections/listing-08-26/src/main.rs
deleted file mode 100755
index f3f6aa1..0000000
--- a/listings/ch08-common-collections/listing-08-26/src/main.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-fn main() {
-    // ANCHOR: here
-    use std::collections::HashMap;
-
-    let text = "hello world wonderful world";
-
-    let mut map = HashMap::new();
-
-    for word in text.split_whitespace() {
-        let count = map.entry(word).or_insert(0);
-        *count += 1;
-    }
-
-    println!("{:?}", map);
-    // ANCHOR_END: here
-}
diff --git a/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.lock b/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.toml b/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/src/main.rs b/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-02-format/Cargo.lock b/listings/ch08-common-collections/no-listing-02-format/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-02-format/Cargo.toml b/listings/ch08-common-collections/no-listing-02-format/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-02-format/src/main.rs b/listings/ch08-common-collections/no-listing-02-format/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.lock b/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.toml b/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/src/main.rs b/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.lock b/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.toml b/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch08-common-collections/output-only-01-not-char-boundary/output.txt b/listings/ch08-common-collections/output-only-01-not-char-boundary/output.txt
old mode 100755
new mode 100644
index 35db879..de65b05
--- a/listings/ch08-common-collections/output-only-01-not-char-boundary/output.txt
+++ b/listings/ch08-common-collections/output-only-01-not-char-boundary/output.txt
@@ -1,6 +1,7 @@
 $ cargo run
    Compiling collections v0.1.0 (file:///projects/collections)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.43s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
      Running `target/debug/collections`
-thread 'main' panicked at 'byte index 1 is not a char boundary; it is inside 'З' (bytes 0..2) of `Здравствуйте`', src/main.rs:4:14
+thread 'main' panicked at src/main.rs:4:19:
+byte index 1 is not a char boundary; it is inside 'З' (bytes 0..2) of `Здравствуйте`
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/listings/ch08-common-collections/output-only-01-not-char-boundary/src/main.rs b/listings/ch08-common-collections/output-only-01-not-char-boundary/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-01/Cargo.lock b/listings/ch09-error-handling/listing-09-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-01/Cargo.toml b/listings/ch09-error-handling/listing-09-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-01/output.txt b/listings/ch09-error-handling/listing-09-01/output.txt
old mode 100755
new mode 100644
index 89aebb9..5f4def0
--- a/listings/ch09-error-handling/listing-09-01/output.txt
+++ b/listings/ch09-error-handling/listing-09-01/output.txt
@@ -1,6 +1,7 @@
 $ cargo run
    Compiling panic v0.1.0 (file:///projects/panic)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.27s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
      Running `target/debug/panic`
-thread 'main' panicked at 'index out of bounds: the len is 3 but the index is 99', src/main.rs:4:5
+thread 'main' panicked at src/main.rs:4:6:
+index out of bounds: the len is 3 but the index is 99
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/listings/ch09-error-handling/listing-09-01/src/main.rs b/listings/ch09-error-handling/listing-09-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-03/Cargo.lock b/listings/ch09-error-handling/listing-09-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-03/Cargo.toml b/listings/ch09-error-handling/listing-09-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-03/src/main.rs b/listings/ch09-error-handling/listing-09-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-04/Cargo.lock b/listings/ch09-error-handling/listing-09-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-04/Cargo.toml b/listings/ch09-error-handling/listing-09-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-04/output.txt b/listings/ch09-error-handling/listing-09-04/output.txt
old mode 100755
new mode 100644
index f776a59..b36bdc0
--- a/listings/ch09-error-handling/listing-09-04/output.txt
+++ b/listings/ch09-error-handling/listing-09-04/output.txt
@@ -1,6 +1,7 @@
 $ cargo run
    Compiling error-handling v0.1.0 (file:///projects/error-handling)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.73s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
      Running `target/debug/error-handling`
-thread 'main' panicked at 'Problem opening the file: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/main.rs:8:23
+thread 'main' panicked at src/main.rs:8:23:
+Problem opening the file: Os { code: 2, kind: NotFound, message: "No such file or directory" }
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/listings/ch09-error-handling/listing-09-04/src/main.rs b/listings/ch09-error-handling/listing-09-04/src/main.rs
old mode 100755
new mode 100644
index 69da109..832f57f
--- a/listings/ch09-error-handling/listing-09-04/src/main.rs
+++ b/listings/ch09-error-handling/listing-09-04/src/main.rs
@@ -5,6 +5,6 @@ fn main() {
 
     let greeting_file = match greeting_file_result {
         Ok(file) => file,
-        Err(error) => panic!("Problem opening the file: {:?}", error),
+        Err(error) => panic!("Problem opening the file: {error:?}"),
     };
 }
diff --git a/listings/ch09-error-handling/listing-09-05/Cargo.lock b/listings/ch09-error-handling/listing-09-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-05/Cargo.toml b/listings/ch09-error-handling/listing-09-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-05/src/main.rs b/listings/ch09-error-handling/listing-09-05/src/main.rs
old mode 100755
new mode 100644
index 83ea010..e0bc55c
--- a/listings/ch09-error-handling/listing-09-05/src/main.rs
+++ b/listings/ch09-error-handling/listing-09-05/src/main.rs
@@ -9,10 +9,10 @@ fn main() {
         Err(error) => match error.kind() {
             ErrorKind::NotFound => match File::create("hello.txt") {
                 Ok(fc) => fc,
-                Err(e) => panic!("Problem creating the file: {:?}", e),
+                Err(e) => panic!("Problem creating the file: {e:?}"),
             },
             other_error => {
-                panic!("Problem opening the file: {:?}", other_error);
+                panic!("Problem opening the file: {other_error:?}");
             }
         },
     };
diff --git a/listings/ch09-error-handling/listing-09-06/Cargo.lock b/listings/ch09-error-handling/listing-09-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-06/Cargo.toml b/listings/ch09-error-handling/listing-09-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-06/src/main.rs b/listings/ch09-error-handling/listing-09-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-07/Cargo.lock b/listings/ch09-error-handling/listing-09-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-07/Cargo.toml b/listings/ch09-error-handling/listing-09-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-07/src/main.rs b/listings/ch09-error-handling/listing-09-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-08/Cargo.lock b/listings/ch09-error-handling/listing-09-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-08/Cargo.toml b/listings/ch09-error-handling/listing-09-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-08/src/main.rs b/listings/ch09-error-handling/listing-09-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-09/Cargo.lock b/listings/ch09-error-handling/listing-09-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-09/Cargo.toml b/listings/ch09-error-handling/listing-09-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-09/src/main.rs b/listings/ch09-error-handling/listing-09-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-10/Cargo.lock b/listings/ch09-error-handling/listing-09-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-10/Cargo.toml b/listings/ch09-error-handling/listing-09-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-10/output.txt b/listings/ch09-error-handling/listing-09-10/output.txt
old mode 100755
new mode 100644
index 75b9cf2..dbc9bb1
--- a/listings/ch09-error-handling/listing-09-10/output.txt
+++ b/listings/ch09-error-handling/listing-09-10/output.txt
@@ -11,4 +11,4 @@ error[E0277]: the `?` operator can only be used in a function that returns `Resu
   = help: the trait `FromResidual<Result<Infallible, std::io::Error>>` is not implemented for `()`
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `error-handling` due to previous error
+error: could not compile `error-handling` (bin "error-handling") due to 1 previous error
diff --git a/listings/ch09-error-handling/listing-09-10/src/main.rs b/listings/ch09-error-handling/listing-09-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-11/Cargo.lock b/listings/ch09-error-handling/listing-09-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-11/Cargo.toml b/listings/ch09-error-handling/listing-09-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-11/src/main.rs b/listings/ch09-error-handling/listing-09-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-12/Cargo.lock b/listings/ch09-error-handling/listing-09-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-12/Cargo.toml b/listings/ch09-error-handling/listing-09-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-12/src/main.rs b/listings/ch09-error-handling/listing-09-12/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-13/Cargo.lock b/listings/ch09-error-handling/listing-09-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-13/Cargo.toml b/listings/ch09-error-handling/listing-09-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/listing-09-13/src/lib.rs b/listings/ch09-error-handling/listing-09-13/src/lib.rs
new file mode 100644
index 0000000..d093831
--- /dev/null
+++ b/listings/ch09-error-handling/listing-09-13/src/lib.rs
@@ -0,0 +1,17 @@
+pub struct Guess {
+    value: i32,
+}
+
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        if value < 1 || value > 100 {
+            panic!("Guess value must be between 1 and 100, got {value}.");
+        }
+
+        Guess { value }
+    }
+
+    pub fn value(&self) -> i32 {
+        self.value
+    }
+}
diff --git a/listings/ch09-error-handling/listing-09-13/src/main.rs b/listings/ch09-error-handling/listing-09-13/src/main.rs
old mode 100755
new mode 100644
index 9e07c1e..cda3893
--- a/listings/ch09-error-handling/listing-09-13/src/main.rs
+++ b/listings/ch09-error-handling/listing-09-13/src/main.rs
@@ -1,27 +1,8 @@
+use guessing_game::Guess;
 use rand::Rng;
 use std::cmp::Ordering;
 use std::io;
 
-// ANCHOR: here
-pub struct Guess {
-    value: i32,
-}
-
-impl Guess {
-    pub fn new(value: i32) -> Guess {
-        if value < 1 || value > 100 {
-            panic!("Guess value must be between 1 and 100, got {}.", value);
-        }
-
-        Guess { value }
-    }
-
-    pub fn value(&self) -> i32 {
-        self.value
-    }
-}
-// ANCHOR_END: here
-
 fn main() {
     println!("Guess the number!");
 
diff --git a/listings/ch09-error-handling/no-listing-01-panic/Cargo.lock b/listings/ch09-error-handling/no-listing-01-panic/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-01-panic/Cargo.toml b/listings/ch09-error-handling/no-listing-01-panic/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-01-panic/output.txt b/listings/ch09-error-handling/no-listing-01-panic/output.txt
old mode 100755
new mode 100644
index b25ed85..ced4ee7
--- a/listings/ch09-error-handling/no-listing-01-panic/output.txt
+++ b/listings/ch09-error-handling/no-listing-01-panic/output.txt
@@ -1,6 +1,7 @@
 $ cargo run
    Compiling panic v0.1.0 (file:///projects/panic)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.25s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
      Running `target/debug/panic`
-thread 'main' panicked at 'crash and burn', src/main.rs:2:5
+thread 'main' panicked at src/main.rs:2:5:
+crash and burn
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/listings/ch09-error-handling/no-listing-01-panic/src/main.rs b/listings/ch09-error-handling/no-listing-01-panic/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/Cargo.lock b/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/Cargo.lock
deleted file mode 100755
index 1fa96b7..0000000
--- a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "error-handling"
-version = "0.1.0"
-
diff --git a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/Cargo.toml b/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/Cargo.toml
deleted file mode 100755
index c496db7..0000000
--- a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "error-handling"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/output.txt b/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/output.txt
deleted file mode 100755
index aa95afa..0000000
--- a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/output.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-$ cargo run
-   Compiling error-handling v0.1.0 (file:///projects/error-handling)
-error[E0308]: mismatched types
- --> src/main.rs:4:18
-  |
-4 |     let f: u32 = File::open("hello.txt");
-  |            ---   ^^^^^^^^^^^^^^^^^^^^^^^ expected `u32`, found enum `Result`
-  |            |
-  |            expected due to this
-  |
-  = note: expected type `u32`
-             found enum `Result<File, std::io::Error>`
-
-For more information about this error, try `rustc --explain E0308`.
-error: could not compile `error-handling` due to previous error
diff --git a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/src/main.rs b/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/src/main.rs
deleted file mode 100755
index a637f5f..0000000
--- a/listings/ch09-error-handling/no-listing-02-ask-compiler-for-type/src/main.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-use std::fs::File;
-
-fn main() {
-    // ANCHOR: here
-    let f: u32 = File::open("hello.txt");
-    // ANCHOR_END: here
-}
diff --git a/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.lock b/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.toml b/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-04-unwrap/src/main.rs b/listings/ch09-error-handling/no-listing-04-unwrap/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-05-expect/Cargo.lock b/listings/ch09-error-handling/no-listing-05-expect/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-05-expect/Cargo.toml b/listings/ch09-error-handling/no-listing-05-expect/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-05-expect/src/main.rs b/listings/ch09-error-handling/no-listing-05-expect/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.lock b/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.toml b/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/src/main.rs b/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.lock b/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.toml b/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch09-error-handling/no-listing-09-guess-out-of-range/src/main.rs b/listings/ch09-error-handling/no-listing-09-guess-out-of-range/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/src/main.rs
old mode 100755
new mode 100644
index a4dba7e..c9e9bbb
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/src/main.rs
@@ -10,7 +10,7 @@ fn main() {
         }
     }
 
-    println!("The largest number is {}", largest);
+    println!("The largest number is {largest}");
     // ANCHOR_END: here
     assert_eq!(*largest, 100);
     // ANCHOR: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/src/main.rs
old mode 100755
new mode 100644
index 8c523a8..fd43154
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/src/main.rs
@@ -9,7 +9,7 @@ fn main() {
         }
     }
 
-    println!("The largest number is {}", largest);
+    println!("The largest number is {largest}");
 
     let number_list = vec![102, 34, 6000, 89, 54, 2, 43, 8];
 
@@ -21,5 +21,5 @@ fn main() {
         }
     }
 
-    println!("The largest number is {}", largest);
+    println!("The largest number is {largest}");
 }
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/src/main.rs
old mode 100755
new mode 100644
index 8992229..1878f5a
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/src/main.rs
@@ -15,7 +15,7 @@ fn main() {
     let number_list = vec![34, 50, 25, 100, 65];
 
     let result = largest(&number_list);
-    println!("The largest number is {}", result);
+    println!("The largest number is {result}");
     // ANCHOR_END: here
     assert_eq!(*result, 100);
     // ANCHOR: here
@@ -23,7 +23,7 @@ fn main() {
     let number_list = vec![102, 34, 6000, 89, 54, 2, 43, 8];
 
     let result = largest(&number_list);
-    println!("The largest number is {}", result);
+    println!("The largest number is {result}");
     // ANCHOR_END: here
     assert_eq!(*result, 6000);
     // ANCHOR: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs
old mode 100755
new mode 100644
index a47e3f2..ac3b1f7
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs
@@ -27,7 +27,7 @@ fn main() {
     let number_list = vec![34, 50, 25, 100, 65];
 
     let result = largest_i32(&number_list);
-    println!("The largest number is {}", result);
+    println!("The largest number is {result}");
     // ANCHOR_END: here
     assert_eq!(*result, 100);
     // ANCHOR: here
@@ -35,7 +35,7 @@ fn main() {
     let char_list = vec!['y', 'm', 'a', 'q'];
 
     let result = largest_char(&char_list);
-    println!("The largest char is {}", result);
+    println!("The largest char is {result}");
     // ANCHOR_END: here
     assert_eq!(*result, 'y');
     // ANCHOR: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt
old mode 100755
new mode 100644
index 1a705ed..05b96ca
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt
@@ -14,4 +14,4 @@ help: consider restricting type parameter `T`
   |             ++++++++++++++++++++++
 
 For more information about this error, try `rustc --explain E0369`.
-error: could not compile `chapter10` due to previous error
+error: could not compile `chapter10` (bin "chapter10") due to 1 previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs
old mode 100755
new mode 100644
index df33743..094eb41
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs
@@ -14,10 +14,10 @@ fn main() {
     let number_list = vec![34, 50, 25, 100, 65];
 
     let result = largest(&number_list);
-    println!("The largest number is {}", result);
+    println!("The largest number is {result}");
 
     let char_list = vec!['y', 'm', 'a', 'q'];
 
     let result = largest(&char_list);
-    println!("The largest char is {}", result);
+    println!("The largest char is {result}");
 }
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/output.txt
old mode 100755
new mode 100644
index 2482c38..5f6c3f4
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/output.txt
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/output.txt
@@ -7,4 +7,4 @@ error[E0308]: mismatched types
   |                                      ^^^ expected integer, found floating-point number
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `chapter10` due to previous error
+error: could not compile `chapter10` (bin "chapter10") due to 1 previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/main.rs
deleted file mode 100755
index 7aa6a3b..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/main.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-fn largest<T: PartialOrd + Copy>(list: &[T]) -> T {
-    let mut largest = list[0];
-
-    for &item in list {
-        if item > largest {
-            largest = item;
-        }
-    }
-
-    largest
-}
-
-fn main() {
-    let number_list = vec![34, 50, 25, 100, 65];
-
-    let result = largest(&number_list);
-    println!("The largest number is {}", result);
-
-    let char_list = vec!['y', 'm', 'a', 'q'];
-
-    let result = largest(&char_list);
-    println!("The largest char is {}", result);
-}
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/output.txt
old mode 100755
new mode 100644
index ad73272..5c44142
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/output.txt
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/output.txt
@@ -3,13 +3,15 @@ $ cargo run
 error[E0597]: `x` does not live long enough
  --> src/main.rs:6:13
   |
+5 |         let x = 5;
+  |             - binding `x` declared here
 6 |         r = &x;
   |             ^^ borrowed value does not live long enough
 7 |     }
   |     - `x` dropped here while still borrowed
 8 |
-9 |     println!("r: {}", r);
-  |                       - borrow later used here
+9 |     println!("r: {r}");
+  |                  --- borrow later used here
 
 For more information about this error, try `rustc --explain E0597`.
-error: could not compile `chapter10` due to previous error
+error: could not compile `chapter10` (bin "chapter10") due to 1 previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/lib.rs
deleted file mode 100755
index 669cc5f..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/lib.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-use std::fmt::Display;
-
-struct Pair<T> {
-    x: T,
-    y: T,
-}
-
-impl<T> Pair<T> {
-    fn new(x: T, y: T) -> Self {
-        Self { x, y }
-    }
-}
-
-impl<T: Display + PartialOrd> Pair<T> {
-    fn cmp_display(&self) {
-        if self.x >= self.y {
-            println!("The largest member is x = {}", self.x);
-        } else {
-            println!("The largest member is y = {}", self.y);
-        }
-    }
-}
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/main.rs
old mode 100755
new mode 100644
index d71134e..773340e
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/main.rs
@@ -6,5 +6,5 @@ fn main() {
         r = &x;
     }
 
-    println!("r: {}", r);
+    println!("r: {r}");
 }
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/output.txt
deleted file mode 100755
index 8b239e4..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/output.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-$ cargo run
-   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
-error[E0597]: `x` does not live long enough
-  --> src/main.rs:7:17
-   |
-7  |             r = &x;
-   |                 ^^ borrowed value does not live long enough
-8  |         }
-   |         - `x` dropped here while still borrowed
-9  | 
-10 |         println!("r: {}", r);
-   |                           - borrow later used here
-
-For more information about this error, try `rustc --explain E0597`.
-error: could not compile `chapter10` due to previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/rustfmt-ignore b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/src/main.rs
old mode 100755
new mode 100644
index e8ca923..6679bcf
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/src/main.rs
@@ -6,5 +6,5 @@ fn main() {
         r = &x;           //  |       |
     }                     // -+       |
                           //          |
-    println!("r: {}", r); //          |
+    println!("r: {r}");   //          |
 }                         // ---------+
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/rustfmt-ignore b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/src/main.rs
old mode 100755
new mode 100644
index 09ae391..634ff93
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/src/main.rs
@@ -3,6 +3,6 @@ fn main() {
                           //           |
     let r = &x;           // --+-- 'a  |
                           //   |       |
-    println!("r: {}", r); //   |       |
+    println!("r: {r}");   //   |       |
                           // --+       |
 }                         // ----------+
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/rustfmt-ignore b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/rustfmt-ignore
deleted file mode 100755
index 9a53c71..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/rustfmt-ignore
+++ /dev/null
@@ -1,3 +0,0 @@
-We have some weird comments pointing out borrowing scopes that we don't want to change;
-unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
-manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/src/main.rs
old mode 100755
new mode 100644
index 0f076a7..8b64cd0
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/src/main.rs
@@ -3,5 +3,5 @@ fn main() {
     let string2 = "xyz";
 
     let result = longest(string1.as_str(), string2);
-    println!("The longest string is {}", result);
+    println!("The longest string is {result}");
 }
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/output.txt
old mode 100755
new mode 100644
index 534a984..1af8bd5
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/output.txt
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/output.txt
@@ -12,5 +12,23 @@ help: consider introducing a named lifetime parameter
 9 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
   |           ++++     ++          ++          ++
 
+error: lifetime may not live long enough
+  --> src/main.rs:11:9
+   |
+9  | fn longest(x: &str, y: &str) -> &str {
+   |               - let's call the lifetime of this reference `'1`
+10 |     if x.len() > y.len() {
+11 |         x
+   |         ^ returning this value requires that `'1` must outlive `'static`
+
+error: lifetime may not live long enough
+  --> src/main.rs:13:9
+   |
+9  | fn longest(x: &str, y: &str) -> &str {
+   |                        - let's call the lifetime of this reference `'2`
+...
+13 |         y
+   |         ^ returning this value requires that `'2` must outlive `'static`
+
 For more information about this error, try `rustc --explain E0106`.
-error: could not compile `chapter10` due to previous error
+error: could not compile `chapter10` (bin "chapter10") due to 3 previous errors
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/src/main.rs
old mode 100755
new mode 100644
index 6af8c9f..bf41acd
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/src/main.rs
@@ -3,7 +3,7 @@ fn main() {
     let string2 = "xyz";
 
     let result = longest(string1.as_str(), string2);
-    println!("The longest string is {}", result);
+    println!("The longest string is {result}");
 }
 
 // ANCHOR: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/output.txt
deleted file mode 100755
index 534a984..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/output.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-$ cargo run
-   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
-error[E0106]: missing lifetime specifier
- --> src/main.rs:9:33
-  |
-9 | fn longest(x: &str, y: &str) -> &str {
-  |               ----     ----     ^ expected named lifetime parameter
-  |
-  = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `x` or `y`
-help: consider introducing a named lifetime parameter
-  |
-9 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
-  |           ++++     ++          ++          ++
-
-For more information about this error, try `rustc --explain E0106`.
-error: could not compile `chapter10` due to previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/src/main.rs
old mode 100755
new mode 100644
index 09c3a0d..7668de1
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/src/main.rs
@@ -3,7 +3,7 @@ fn main() {
     let string2 = "xyz";
 
     let result = longest(string1.as_str(), string2);
-    println!("The longest string is {}", result);
+    println!("The longest string is {result}");
 }
 
 // ANCHOR: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/src/main.rs
old mode 100755
new mode 100644
index 836ec72..fc9ff29
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/src/main.rs
@@ -5,7 +5,7 @@ fn main() {
     {
         let string2 = String::from("xyz");
         let result = longest(string1.as_str(), string2.as_str());
-        println!("The longest string is {}", result);
+        println!("The longest string is {result}");
     }
 }
 // ANCHOR_END: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/output.txt
old mode 100755
new mode 100644
index 7f31ce0..cb209ab
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/output.txt
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/output.txt
@@ -3,12 +3,14 @@ $ cargo run
 error[E0597]: `string2` does not live long enough
  --> src/main.rs:6:44
   |
+5 |         let string2 = String::from("xyz");
+  |             ------- binding `string2` declared here
 6 |         result = longest(string1.as_str(), string2.as_str());
-  |                                            ^^^^^^^^^^^^^^^^ borrowed value does not live long enough
+  |                                            ^^^^^^^ borrowed value does not live long enough
 7 |     }
   |     - `string2` dropped here while still borrowed
-8 |     println!("The longest string is {}", result);
-  |                                          ------ borrow later used here
+8 |     println!("The longest string is {result}");
+  |                                     -------- borrow later used here
 
 For more information about this error, try `rustc --explain E0597`.
-error: could not compile `chapter10` due to previous error
+error: could not compile `chapter10` (bin "chapter10") due to 1 previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/src/main.rs
old mode 100755
new mode 100644
index 2a6fa58..f2e6338
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/src/main.rs
@@ -6,7 +6,7 @@ fn main() {
         let string2 = String::from("xyz");
         result = longest(string1.as_str(), string2.as_str());
     }
-    println!("The longest string is {}", result);
+    println!("The longest string is {result}");
 }
 // ANCHOR_END: here
 
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/output.txt
deleted file mode 100755
index 7f31ce0..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/output.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-$ cargo run
-   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
-error[E0597]: `string2` does not live long enough
- --> src/main.rs:6:44
-  |
-6 |         result = longest(string1.as_str(), string2.as_str());
-  |                                            ^^^^^^^^^^^^^^^^ borrowed value does not live long enough
-7 |     }
-  |     - `string2` dropped here while still borrowed
-8 |     println!("The longest string is {}", result);
-  |                                          ------ borrow later used here
-
-For more information about this error, try `rustc --explain E0597`.
-error: could not compile `chapter10` due to previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/src/main.rs
old mode 100755
new mode 100644
index 2937b19..ca3cf86
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/src/main.rs
@@ -4,7 +4,7 @@ struct ImportantExcerpt<'a> {
 
 fn main() {
     let novel = String::from("Call me Ishmael. Some years ago...");
-    let first_sentence = novel.split('.').next().expect("Could not find a '.'");
+    let first_sentence = novel.split('.').next().unwrap();
     let i = ImportantExcerpt {
         part: first_sentence,
     };
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/Cargo.lock
deleted file mode 100755
index 2aa4918..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "ownership"
-version = "0.1.0"
-
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/Cargo.toml
deleted file mode 100755
index e884752..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "ownership"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/src/main.rs
deleted file mode 100755
index 431a261..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/listing-10-26/src/main.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-// ANCHOR: here
-fn first_word(s: &str) -> &str {
-    let bytes = s.as_bytes();
-
-    for (i, &item) in bytes.iter().enumerate() {
-        if item == b' ' {
-            return &s[0..i];
-        }
-    }
-
-    &s[..]
-}
-// ANCHOR_END: here
-
-fn main() {
-    let my_string = String::from("hello world");
-
-    // first_word works on slices of `String`s
-    let word = first_word(&my_string[..]);
-
-    let my_string_literal = "hello world";
-
-    // first_word works on slices of string literals
-    let word = first_word(&my_string_literal[..]);
-
-    // Because string literals *are* string slices already,
-    // this works too, without the slice syntax!
-    let word = first_word(my_string_literal);
-}
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/Cargo.lock
deleted file mode 100755
index e8007a1..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "chapter10"
-version = "0.1.0"
-
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/Cargo.toml
deleted file mode 100755
index 489f809..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "chapter10"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/output.txt
deleted file mode 100755
index eca02c2..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/output.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-$ cargo run
-   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
-error[E0508]: cannot move out of type `[T]`, a non-copy slice
- --> src/main.rs:2:23
-  |
-2 |     let mut largest = list[0];
-  |                       ^^^^^^^
-  |                       |
-  |                       cannot move out of here
-  |                       move occurs because `list[_]` has type `T`, which does not implement the `Copy` trait
-  |                       help: consider borrowing here: `&list[0]`
-
-error[E0507]: cannot move out of a shared reference
- --> src/main.rs:4:18
-  |
-4 |     for &item in list {
-  |         -----    ^^^^
-  |         ||
-  |         |data moved here
-  |         |move occurs because `item` has type `T`, which does not implement the `Copy` trait
-  |         help: consider removing the `&`: `item`
-
-Some errors have detailed explanations: E0507, E0508.
-For more information about an error, try `rustc --explain E0507`.
-error: could not compile `chapter10` due to 2 previous errors
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/src/main.rs
deleted file mode 100755
index 525ce81..0000000
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-fixing-listing-10-05/src/main.rs
+++ /dev/null
@@ -1,25 +0,0 @@
-// ANCHOR: here
-fn largest<T: PartialOrd>(list: &[T]) -> T {
-    // ANCHOR_END: here
-    let mut largest = list[0];
-
-    for &item in list {
-        if item > largest {
-            largest = item;
-        }
-    }
-
-    largest
-}
-
-fn main() {
-    let number_list = vec![34, 50, 25, 100, 65];
-
-    let result = largest(&number_list);
-    println!("The largest number is {}", result);
-
-    let char_list = vec!['y', 'm', 'a', 'q'];
-
-    let result = largest(&char_list);
-    println!("The largest char is {}", result);
-}
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/src/lib.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/src/main.rs
old mode 100755
new mode 100644
index d144305..4c35d90
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/src/main.rs
@@ -3,7 +3,7 @@ fn main() {
     let string2 = "efghijklmnopqrstuvwxyz";
 
     let result = longest(string1.as_str(), string2);
-    println!("The longest string is {}", result);
+    println!("The longest string is {result}");
 }
 
 // ANCHOR: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt
old mode 100755
new mode 100644
index 0c628b6..9b9ef23
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt
+++ b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt
@@ -1,10 +1,13 @@
 $ cargo run
    Compiling chapter10 v0.1.0 (file:///projects/chapter10)
-error[E0515]: cannot return reference to local variable `result`
+error[E0515]: cannot return value referencing local variable `result`
   --> src/main.rs:11:5
    |
 11 |     result.as_str()
-   |     ^^^^^^^^^^^^^^^ returns a reference to data owned by the current function
+   |     ------^^^^^^^^^
+   |     |
+   |     returns a value referencing data owned by the current function
+   |     `result` is borrowed here
 
 For more information about this error, try `rustc --explain E0515`.
-error: could not compile `chapter10` due to previous error
+error: could not compile `chapter10` (bin "chapter10") due to 1 previous error
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/src/main.rs
old mode 100755
new mode 100644
index aca4be0..4d596ec
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/src/main.rs
@@ -3,7 +3,7 @@ fn main() {
     let string2 = "xyz";
 
     let result = longest(string1.as_str(), string2);
-    println!("The longest string is {}", result);
+    println!("The longest string is {result}");
 }
 
 // ANCHOR: here
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/src/main.rs
old mode 100755
new mode 100644
index 32ad530..c04ec38
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/src/main.rs
@@ -13,7 +13,7 @@ impl<'a> ImportantExcerpt<'a> {
 // ANCHOR: 3rd
 impl<'a> ImportantExcerpt<'a> {
     fn announce_and_return_part(&self, announcement: &str) -> &str {
-        println!("Attention please: {}", announcement);
+        println!("Attention please: {announcement}");
         self.part
     }
 }
@@ -21,7 +21,7 @@ impl<'a> ImportantExcerpt<'a> {
 
 fn main() {
     let novel = String::from("Call me Ishmael. Some years ago...");
-    let first_sentence = novel.split('.').next().expect("Could not find a '.'");
+    let first_sentence = novel.split('.').next().unwrap();
     let i = ImportantExcerpt {
         part: first_sentence,
     };
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs
old mode 100755
new mode 100644
index cfafa9a..4b0201f
--- a/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs
+++ b/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs
@@ -7,7 +7,7 @@ fn main() {
         string2,
         "Today is someone's birthday!",
     );
-    println!("The longest string is {}", result);
+    println!("The longest string is {result}");
 }
 
 // ANCHOR: here
@@ -21,7 +21,7 @@ fn longest_with_an_announcement<'a, T>(
 where
     T: Display,
 {
-    println!("Announcement! {}", ann);
+    println!("Announcement! {ann}");
     if x.len() > y.len() {
         x
     } else {
diff --git a/listings/ch11-writing-automated-tests/listing-11-01/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-01/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-01/output.txt b/listings/ch11-writing-automated-tests/listing-11-01/output.txt
old mode 100755
new mode 100644
index c3e812e..128309c
--- a/listings/ch11-writing-automated-tests/listing-11-01/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-01/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.57s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.57s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/listing-11-01/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-01/src/lib.rs
old mode 100755
new mode 100644
index 1b4a90c..7d12d9a
--- a/listings/ch11-writing-automated-tests/listing-11-01/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/listing-11-01/src/lib.rs
@@ -1,8 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
 #[cfg(test)]
 mod tests {
+    use super::*;
+
     #[test]
     fn it_works() {
-        let result = 2 + 2;
+        let result = add(2, 2);
         assert_eq!(result, 4);
     }
 }
diff --git a/listings/ch11-writing-automated-tests/listing-11-03/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-03/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-03/output.txt b/listings/ch11-writing-automated-tests/listing-11-03/output.txt
old mode 100755
new mode 100644
index 2fa5cf0..cf2c206
--- a/listings/ch11-writing-automated-tests/listing-11-03/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-03/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.72s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.72s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 2 tests
@@ -10,7 +10,8 @@ test tests::exploration ... ok
 failures:
 
 ---- tests::another stdout ----
-thread 'main' panicked at 'Make this test fail', src/lib.rs:10:9
+thread 'tests::another' panicked at src/lib.rs:17:9:
+Make this test fail
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch11-writing-automated-tests/listing-11-03/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-03/src/lib.rs
old mode 100755
new mode 100644
index a9ec008..67b6552
--- a/listings/ch11-writing-automated-tests/listing-11-03/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/listing-11-03/src/lib.rs
@@ -1,11 +1,18 @@
 // ANCHOR: here
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
 #[cfg(test)]
 mod tests {
+    use super::*;
+
     #[test]
     fn exploration() {
-        assert_eq!(2 + 2, 4);
+        let result = add(2, 2);
+        assert_eq!(result, 4);
     }
-
+    
     #[test]
     fn another() {
         panic!("Make this test fail");
diff --git a/listings/ch11-writing-automated-tests/listing-11-05/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-05/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-05/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-05/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-06/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-06/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-06/output.txt b/listings/ch11-writing-automated-tests/listing-11-06/output.txt
old mode 100755
new mode 100644
index dad02b4..e03add2
--- a/listings/ch11-writing-automated-tests/listing-11-06/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-06/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling rectangle v0.1.0 (file:///projects/rectangle)
-    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
      Running unittests src/lib.rs (target/debug/deps/rectangle-6584c4561e48942e)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/listing-11-06/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-06/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-07/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-07/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-07/output.txt b/listings/ch11-writing-automated-tests/listing-11-07/output.txt
old mode 100755
new mode 100644
index fa02835..908ed57
--- a/listings/ch11-writing-automated-tests/listing-11-07/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-07/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.58s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/listing-11-07/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-07/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-08/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-08/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-08/output.txt b/listings/ch11-writing-automated-tests/listing-11-08/output.txt
old mode 100755
new mode 100644
index caca154..a5a7643
--- a/listings/ch11-writing-automated-tests/listing-11-08/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-08/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
-    Finished test [unoptimized + debuginfo] target(s) in 0.58s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
      Running unittests src/lib.rs (target/debug/deps/guessing_game-57d70c3acb738f4d)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/listing-11-08/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-08/src/lib.rs
old mode 100755
new mode 100644
index 9391be5..54e447b
--- a/listings/ch11-writing-automated-tests/listing-11-08/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/listing-11-08/src/lib.rs
@@ -5,7 +5,7 @@ pub struct Guess {
 impl Guess {
     pub fn new(value: i32) -> Guess {
         if value < 1 || value > 100 {
-            panic!("Guess value must be between 1 and 100, got {}.", value);
+            panic!("Guess value must be between 1 and 100, got {value}.");
         }
 
         Guess { value }
diff --git a/listings/ch11-writing-automated-tests/listing-11-09/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-09/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-09/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-09/src/lib.rs
old mode 100755
new mode 100644
index cc1c5c3..1bb4641
--- a/listings/ch11-writing-automated-tests/listing-11-09/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/listing-11-09/src/lib.rs
@@ -9,13 +9,11 @@ impl Guess {
     pub fn new(value: i32) -> Guess {
         if value < 1 {
             panic!(
-                "Guess value must be greater than or equal to 1, got {}.",
-                value
+                "Guess value must be greater than or equal to 1, got {value}."
             );
         } else if value > 100 {
             panic!(
-                "Guess value must be less than or equal to 100, got {}.",
-                value
+                "Guess value must be less than or equal to 100, got {value}."
             );
         }
 
diff --git a/listings/ch11-writing-automated-tests/listing-11-10/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-10/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-10/output.txt b/listings/ch11-writing-automated-tests/listing-11-10/output.txt
old mode 100755
new mode 100644
index 681cfbb..36fae57
--- a/listings/ch11-writing-automated-tests/listing-11-10/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-10/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling silly-function v0.1.0 (file:///projects/silly-function)
-    Finished test [unoptimized + debuginfo] target(s) in 0.58s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
      Running unittests src/lib.rs (target/debug/deps/silly_function-160869f38cff9166)
 
 running 2 tests
@@ -11,9 +11,10 @@ failures:
 
 ---- tests::this_test_will_fail stdout ----
 I got the value 8
-thread 'main' panicked at 'assertion failed: `(left == right)`
-  left: `5`,
- right: `10`', src/lib.rs:19:9
+thread 'tests::this_test_will_fail' panicked at src/lib.rs:19:9:
+assertion `left == right` failed
+  left: 5
+ right: 10
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs
old mode 100755
new mode 100644
index 6fd76ce..99fc06b
--- a/listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs
@@ -1,5 +1,5 @@
 fn prints_and_returns_10(a: i32) -> i32 {
-    println!("I got the value {}", a);
+    println!("I got the value {a}");
     10
 }
 
diff --git a/listings/ch11-writing-automated-tests/listing-11-11/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-11/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-11/output.txt b/listings/ch11-writing-automated-tests/listing-11-11/output.txt
old mode 100755
new mode 100644
index fe19c83..a0fe55d
--- a/listings/ch11-writing-automated-tests/listing-11-11/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-11/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.62s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 3 tests
diff --git a/listings/ch11-writing-automated-tests/listing-11-11/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-11/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-12/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-12/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-12/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-12/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-13/Cargo.lock b/listings/ch11-writing-automated-tests/listing-11-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-13/Cargo.toml b/listings/ch11-writing-automated-tests/listing-11-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-13/output.txt b/listings/ch11-writing-automated-tests/listing-11-13/output.txt
old mode 100755
new mode 100644
index 22970e9..84344ad
--- a/listings/ch11-writing-automated-tests/listing-11-13/output.txt
+++ b/listings/ch11-writing-automated-tests/listing-11-13/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 1.31s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 1.31s
      Running unittests src/lib.rs (target/debug/deps/adder-1082c4b063a8fbe6)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/listing-11-13/src/lib.rs b/listings/ch11-writing-automated-tests/listing-11-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs b/listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs
old mode 100755
new mode 100644
index e26fa71..3822d6b
--- a/listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs
+++ b/listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs
@@ -1,6 +1,6 @@
-use adder;
+use adder::add_two;
 
 #[test]
 fn it_adds_two() {
-    assert_eq!(4, adder::add_two(2));
+    assert_eq!(4, add_two(2));
 }
diff --git a/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/output.txt b/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/output.txt
old mode 100755
new mode 100644
index 8a33308..79d3ae2
--- a/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.59s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.59s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/src/lib.rs
old mode 100755
new mode 100644
index 330bddf..5be58b9
--- a/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/src/lib.rs
@@ -1,7 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
 #[cfg(test)]
 mod tests {
+    use super::*;
+
     #[test]
     fn exploration() {
-        assert_eq!(2 + 2, 4);
+        let result = add(2, 2);
+        assert_eq!(result, 4);
     }
 }
diff --git a/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/output.txt b/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/output.txt
old mode 100755
new mode 100644
index 30e45e5..6304403
--- a/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling rectangle v0.1.0 (file:///projects/rectangle)
-    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
      Running unittests src/lib.rs (target/debug/deps/rectangle-6584c4561e48942e)
 
 running 2 tests
diff --git a/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/output.txt b/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/output.txt
old mode 100755
new mode 100644
index 7c62822..6d616db
--- a/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling rectangle v0.1.0 (file:///projects/rectangle)
-    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
      Running unittests src/lib.rs (target/debug/deps/rectangle-6584c4561e48942e)
 
 running 2 tests
@@ -10,7 +10,8 @@ test tests::smaller_cannot_hold_larger ... ok
 failures:
 
 ---- tests::larger_can_hold_smaller stdout ----
-thread 'main' panicked at 'assertion failed: larger.can_hold(&smaller)', src/lib.rs:28:9
+thread 'tests::larger_can_hold_smaller' panicked at src/lib.rs:28:9:
+assertion failed: larger.can_hold(&smaller)
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt b/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt
old mode 100755
new mode 100644
index 28e2414..5e91c58
--- a/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.61s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 1 test
@@ -9,9 +9,10 @@ test tests::it_adds_two ... FAILED
 failures:
 
 ---- tests::it_adds_two stdout ----
-thread 'main' panicked at 'assertion failed: `(left == right)`
-  left: `4`,
- right: `5`', src/lib.rs:11:9
+thread 'tests::it_adds_two' panicked at src/lib.rs:11:9:
+assertion `left == right` failed
+  left: 4
+ right: 5
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-05-greeter/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-05-greeter/src/lib.rs
old mode 100755
new mode 100644
index 3ba3d88..433cf14
--- a/listings/ch11-writing-automated-tests/no-listing-05-greeter/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/no-listing-05-greeter/src/lib.rs
@@ -1,5 +1,5 @@
 pub fn greeting(name: &str) -> String {
-    format!("Hello {}!", name)
+    format!("Hello {name}!")
 }
 
 #[cfg(test)]
diff --git a/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/output.txt b/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/output.txt
old mode 100755
new mode 100644
index 3366e3a..0a7d44d
--- a/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling greeter v0.1.0 (file:///projects/greeter)
-    Finished test [unoptimized + debuginfo] target(s) in 0.91s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.91s
      Running unittests src/lib.rs (target/debug/deps/greeter-170b942eb5bf5e3a)
 
 running 1 test
@@ -9,7 +9,8 @@ test tests::greeting_contains_name ... FAILED
 failures:
 
 ---- tests::greeting_contains_name stdout ----
-thread 'main' panicked at 'assertion failed: result.contains(\"Carol\")', src/lib.rs:12:9
+thread 'tests::greeting_contains_name' panicked at src/lib.rs:12:9:
+assertion failed: result.contains("Carol")
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/output.txt b/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/output.txt
old mode 100755
new mode 100644
index cebebda..d2015d5
--- a/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling greeter v0.1.0 (file:///projects/greeter)
-    Finished test [unoptimized + debuginfo] target(s) in 0.93s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.93s
      Running unittests src/lib.rs (target/debug/deps/greeter-170b942eb5bf5e3a)
 
 running 1 test
@@ -9,7 +9,8 @@ test tests::greeting_contains_name ... FAILED
 failures:
 
 ---- tests::greeting_contains_name stdout ----
-thread 'main' panicked at 'Greeting did not contain name, value was `Hello!`', src/lib.rs:12:9
+thread 'tests::greeting_contains_name' panicked at src/lib.rs:12:9:
+Greeting did not contain name, value was `Hello!`
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/output.txt b/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/output.txt
old mode 100755
new mode 100644
index 9318d4c..9b7ec43
--- a/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
-    Finished test [unoptimized + debuginfo] target(s) in 0.62s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
      Running unittests src/lib.rs (target/debug/deps/guessing_game-57d70c3acb738f4d)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/src/lib.rs
old mode 100755
new mode 100644
index 32540ba..0f962fc
--- a/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/src/lib.rs
@@ -7,7 +7,7 @@ pub struct Guess {
 impl Guess {
     pub fn new(value: i32) -> Guess {
         if value < 1 {
-            panic!("Guess value must be between 1 and 100, got {}.", value);
+            panic!("Guess value must be between 1 and 100, got {value}.");
         }
 
         Guess { value }
diff --git a/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/output.txt b/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/output.txt
old mode 100755
new mode 100644
index c176e88..f30b55a
--- a/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
-    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
      Running unittests src/lib.rs (target/debug/deps/guessing_game-57d70c3acb738f4d)
 
 running 1 test
@@ -9,7 +9,8 @@ test tests::greater_than_100 - should panic ... FAILED
 failures:
 
 ---- tests::greater_than_100 stdout ----
-thread 'main' panicked at 'Guess value must be greater than or equal to 1, got 200.', src/lib.rs:13:13
+thread 'tests::greater_than_100' panicked at src/lib.rs:12:13:
+Guess value must be greater than or equal to 1, got 200.
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 note: panic did not contain expected string
       panic message: `"Guess value must be greater than or equal to 1, got 200."`,
diff --git a/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs
old mode 100755
new mode 100644
index 7703dd7..fb5fc0e
--- a/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs
@@ -7,13 +7,11 @@ impl Guess {
         // ANCHOR: here
         if value < 1 {
             panic!(
-                "Guess value must be less than or equal to 100, got {}.",
-                value
+                "Guess value must be less than or equal to 100, got {value}."
             );
         } else if value > 100 {
             panic!(
-                "Guess value must be greater than or equal to 1, got {}.",
-                value
+                "Guess value must be greater than or equal to 1, got {value}."
             );
         }
         // ANCHOR_END: here
diff --git a/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt b/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt
old mode 100755
new mode 100644
index c559de8..8d700c7
--- a/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.60s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.60s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 2 tests
diff --git a/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/output.txt b/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/output.txt
old mode 100755
new mode 100644
index 324d566..e258394
--- a/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/output.txt
+++ b/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.89s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.89s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/common.rs b/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/common.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/integration_test.rs b/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/integration_test.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.lock b/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.toml b/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/src/lib.rs b/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/common/mod.rs b/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/common/mod.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/integration_test.rs b/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/integration_test.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.lock b/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.toml b/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-01-show-output/output.txt b/listings/ch11-writing-automated-tests/output-only-01-show-output/output.txt
old mode 100755
new mode 100644
index 4ececf2..58f1ff4
--- a/listings/ch11-writing-automated-tests/output-only-01-show-output/output.txt
+++ b/listings/ch11-writing-automated-tests/output-only-01-show-output/output.txt
@@ -1,6 +1,6 @@
 $ cargo test -- --show-output
    Compiling silly-function v0.1.0 (file:///projects/silly-function)
-    Finished test [unoptimized + debuginfo] target(s) in 0.60s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.60s
      Running unittests src/lib.rs (target/debug/deps/silly_function-160869f38cff9166)
 
 running 2 tests
@@ -20,9 +20,10 @@ failures:
 
 ---- tests::this_test_will_fail stdout ----
 I got the value 8
-thread 'main' panicked at 'assertion failed: `(left == right)`
-  left: `5`,
- right: `10`', src/lib.rs:19:9
+thread 'tests::this_test_will_fail' panicked at src/lib.rs:19:9:
+assertion `left == right` failed
+  left: 5
+ right: 10
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch11-writing-automated-tests/output-only-01-show-output/src/lib.rs b/listings/ch11-writing-automated-tests/output-only-01-show-output/src/lib.rs
old mode 100755
new mode 100644
index 43c4c92..462d224
--- a/listings/ch11-writing-automated-tests/output-only-01-show-output/src/lib.rs
+++ b/listings/ch11-writing-automated-tests/output-only-01-show-output/src/lib.rs
@@ -1,5 +1,5 @@
 pub fn prints_and_returns_10(a: i32) -> i32 {
-    println!("I got the value {}", a);
+    println!("I got the value {a}");
     10
 }
 
diff --git a/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.lock b/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.toml b/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-02-single-test/output.txt b/listings/ch11-writing-automated-tests/output-only-02-single-test/output.txt
old mode 100755
new mode 100644
index f2da984..47e2a47
--- a/listings/ch11-writing-automated-tests/output-only-02-single-test/output.txt
+++ b/listings/ch11-writing-automated-tests/output-only-02-single-test/output.txt
@@ -1,6 +1,6 @@
 $ cargo test one_hundred
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.69s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.69s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/output-only-02-single-test/src/lib.rs b/listings/ch11-writing-automated-tests/output-only-02-single-test/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.lock b/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.toml b/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/output.txt b/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/output.txt
old mode 100755
new mode 100644
index 255a051..d08940a
--- a/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/output.txt
+++ b/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/output.txt
@@ -1,6 +1,6 @@
 $ cargo test add
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.61s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 2 tests
diff --git a/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/src/lib.rs b/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.lock b/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.toml b/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-04-running-ignored/output.txt b/listings/ch11-writing-automated-tests/output-only-04-running-ignored/output.txt
old mode 100755
new mode 100644
index b37868d..4c7782d
--- a/listings/ch11-writing-automated-tests/output-only-04-running-ignored/output.txt
+++ b/listings/ch11-writing-automated-tests/output-only-04-running-ignored/output.txt
@@ -1,6 +1,6 @@
 $ cargo test -- --ignored
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.61s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/output-only-04-running-ignored/src/lib.rs b/listings/ch11-writing-automated-tests/output-only-04-running-ignored/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.lock b/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.toml b/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-05-single-integration/output.txt b/listings/ch11-writing-automated-tests/output-only-05-single-integration/output.txt
old mode 100755
new mode 100644
index 260beaa..2745d0f
--- a/listings/ch11-writing-automated-tests/output-only-05-single-integration/output.txt
+++ b/listings/ch11-writing-automated-tests/output-only-05-single-integration/output.txt
@@ -1,6 +1,6 @@
 $ cargo test --test integration_test
    Compiling adder v0.1.0 (file:///projects/adder)
-    Finished test [unoptimized + debuginfo] target(s) in 0.64s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.64s
      Running tests/integration_test.rs (target/debug/deps/integration_test-82e7799c1bc62298)
 
 running 1 test
diff --git a/listings/ch11-writing-automated-tests/output-only-05-single-integration/src/lib.rs b/listings/ch11-writing-automated-tests/output-only-05-single-integration/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch11-writing-automated-tests/output-only-05-single-integration/tests/integration_test.rs b/listings/ch11-writing-automated-tests/output-only-05-single-integration/tests/integration_test.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-01/Cargo.lock b/listings/ch12-an-io-project/listing-12-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-01/Cargo.toml b/listings/ch12-an-io-project/listing-12-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-01/output.txt b/listings/ch12-an-io-project/listing-12-01/output.txt
old mode 100755
new mode 100644
index 529115f..d2abb05
--- a/listings/ch12-an-io-project/listing-12-01/output.txt
+++ b/listings/ch12-an-io-project/listing-12-01/output.txt
@@ -1,7 +1,7 @@
 $ cargo run
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.61s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s
      Running `target/debug/minigrep`
-[src/main.rs:5] args = [
+[src/main.rs:5:5] args = [
     "target/debug/minigrep",
 ]
diff --git a/listings/ch12-an-io-project/listing-12-01/src/main.rs b/listings/ch12-an-io-project/listing-12-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-02/Cargo.lock b/listings/ch12-an-io-project/listing-12-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-02/Cargo.toml b/listings/ch12-an-io-project/listing-12-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-02/output.txt b/listings/ch12-an-io-project/listing-12-02/output.txt
old mode 100755
new mode 100644
index 6ef87f7..ad87dcf
--- a/listings/ch12-an-io-project/listing-12-02/output.txt
+++ b/listings/ch12-an-io-project/listing-12-02/output.txt
@@ -1,6 +1,6 @@
 $ cargo run -- test sample.txt
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.0s
      Running `target/debug/minigrep test sample.txt`
 Searching for test
 In file sample.txt
diff --git a/listings/ch12-an-io-project/listing-12-02/src/main.rs b/listings/ch12-an-io-project/listing-12-02/src/main.rs
old mode 100755
new mode 100644
index ae2fa7b..afc3c3c
--- a/listings/ch12-an-io-project/listing-12-02/src/main.rs
+++ b/listings/ch12-an-io-project/listing-12-02/src/main.rs
@@ -6,6 +6,6 @@ fn main() {
     let query = &args[1];
     let file_path = &args[2];
 
-    println!("Searching for {}", query);
-    println!("In file {}", file_path);
+    println!("Searching for {query}");
+    println!("In file {file_path}");
 }
diff --git a/listings/ch12-an-io-project/listing-12-03/Cargo.lock b/listings/ch12-an-io-project/listing-12-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-03/Cargo.toml b/listings/ch12-an-io-project/listing-12-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-03/poem.txt b/listings/ch12-an-io-project/listing-12-03/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-03/src/main.rs b/listings/ch12-an-io-project/listing-12-03/src/main.rs
old mode 100755
new mode 100644
index ae2fa7b..afc3c3c
--- a/listings/ch12-an-io-project/listing-12-03/src/main.rs
+++ b/listings/ch12-an-io-project/listing-12-03/src/main.rs
@@ -6,6 +6,6 @@ fn main() {
     let query = &args[1];
     let file_path = &args[2];
 
-    println!("Searching for {}", query);
-    println!("In file {}", file_path);
+    println!("Searching for {query}");
+    println!("In file {file_path}");
 }
diff --git a/listings/ch12-an-io-project/listing-12-04/Cargo.lock b/listings/ch12-an-io-project/listing-12-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-04/Cargo.toml b/listings/ch12-an-io-project/listing-12-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-04/output.txt b/listings/ch12-an-io-project/listing-12-04/output.txt
old mode 100755
new mode 100644
index 6582ca1..d8cfe39
--- a/listings/ch12-an-io-project/listing-12-04/output.txt
+++ b/listings/ch12-an-io-project/listing-12-04/output.txt
@@ -1,6 +1,6 @@
 $ cargo run -- the poem.txt
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.0s
      Running `target/debug/minigrep the poem.txt`
 Searching for the
 In file poem.txt
diff --git a/listings/ch12-an-io-project/listing-12-04/poem.txt b/listings/ch12-an-io-project/listing-12-04/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-04/src/main.rs b/listings/ch12-an-io-project/listing-12-04/src/main.rs
old mode 100755
new mode 100644
index 944e430..f343249
--- a/listings/ch12-an-io-project/listing-12-04/src/main.rs
+++ b/listings/ch12-an-io-project/listing-12-04/src/main.rs
@@ -10,9 +10,9 @@ fn main() {
     let query = &args[1];
     let file_path = &args[2];
 
-    println!("Searching for {}", query);
+    println!("Searching for {query}");
     // ANCHOR: here
-    println!("In file {}", file_path);
+    println!("In file {file_path}");
 
     let contents = fs::read_to_string(file_path)
         .expect("Should have been able to read the file");
diff --git a/listings/ch12-an-io-project/listing-12-05/Cargo.lock b/listings/ch12-an-io-project/listing-12-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-05/Cargo.toml b/listings/ch12-an-io-project/listing-12-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-05/poem.txt b/listings/ch12-an-io-project/listing-12-05/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-05/src/main.rs b/listings/ch12-an-io-project/listing-12-05/src/main.rs
old mode 100755
new mode 100644
index 0615918..838cacf
--- a/listings/ch12-an-io-project/listing-12-05/src/main.rs
+++ b/listings/ch12-an-io-project/listing-12-05/src/main.rs
@@ -10,8 +10,8 @@ fn main() {
     // --snip--
     // ANCHOR_END: here
 
-    println!("Searching for {}", query);
-    println!("In file {}", file_path);
+    println!("Searching for {query}");
+    println!("In file {file_path}");
 
     let contents = fs::read_to_string(file_path)
         .expect("Should have been able to read the file");
diff --git a/listings/ch12-an-io-project/listing-12-06/Cargo.lock b/listings/ch12-an-io-project/listing-12-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-06/Cargo.toml b/listings/ch12-an-io-project/listing-12-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-06/poem.txt b/listings/ch12-an-io-project/listing-12-06/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-06/src/main.rs b/listings/ch12-an-io-project/listing-12-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-07/Cargo.lock b/listings/ch12-an-io-project/listing-12-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-07/Cargo.toml b/listings/ch12-an-io-project/listing-12-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-07/output.txt b/listings/ch12-an-io-project/listing-12-07/output.txt
old mode 100755
new mode 100644
index d3fa777..e14b954
--- a/listings/ch12-an-io-project/listing-12-07/output.txt
+++ b/listings/ch12-an-io-project/listing-12-07/output.txt
@@ -1,6 +1,7 @@
 $ cargo run
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.0s
      Running `target/debug/minigrep`
-thread 'main' panicked at 'index out of bounds: the len is 1 but the index is 1', src/main.rs:27:21
+thread 'main' panicked at src/main.rs:27:21:
+index out of bounds: the len is 1 but the index is 1
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/listings/ch12-an-io-project/listing-12-07/poem.txt b/listings/ch12-an-io-project/listing-12-07/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-07/src/main.rs b/listings/ch12-an-io-project/listing-12-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-08/Cargo.lock b/listings/ch12-an-io-project/listing-12-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-08/Cargo.toml b/listings/ch12-an-io-project/listing-12-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-08/output.txt b/listings/ch12-an-io-project/listing-12-08/output.txt
old mode 100755
new mode 100644
index de2abd1..c1aa1a9
--- a/listings/ch12-an-io-project/listing-12-08/output.txt
+++ b/listings/ch12-an-io-project/listing-12-08/output.txt
@@ -1,6 +1,7 @@
 $ cargo run
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.0s
      Running `target/debug/minigrep`
-thread 'main' panicked at 'not enough arguments', src/main.rs:26:13
+thread 'main' panicked at src/main.rs:26:13:
+not enough arguments
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/listings/ch12-an-io-project/listing-12-08/poem.txt b/listings/ch12-an-io-project/listing-12-08/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-08/src/main.rs b/listings/ch12-an-io-project/listing-12-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-09/Cargo.lock b/listings/ch12-an-io-project/listing-12-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-09/Cargo.toml b/listings/ch12-an-io-project/listing-12-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-09/poem.txt b/listings/ch12-an-io-project/listing-12-09/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-09/src/main.rs b/listings/ch12-an-io-project/listing-12-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-10/Cargo.lock b/listings/ch12-an-io-project/listing-12-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-10/Cargo.toml b/listings/ch12-an-io-project/listing-12-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-10/output.txt b/listings/ch12-an-io-project/listing-12-10/output.txt
old mode 100755
new mode 100644
index 7aad57f..c5e085b
--- a/listings/ch12-an-io-project/listing-12-10/output.txt
+++ b/listings/ch12-an-io-project/listing-12-10/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
      Running `target/debug/minigrep`
 Problem parsing arguments: not enough arguments
diff --git a/listings/ch12-an-io-project/listing-12-10/poem.txt b/listings/ch12-an-io-project/listing-12-10/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-10/src/main.rs b/listings/ch12-an-io-project/listing-12-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-11/Cargo.lock b/listings/ch12-an-io-project/listing-12-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-11/Cargo.toml b/listings/ch12-an-io-project/listing-12-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-11/poem.txt b/listings/ch12-an-io-project/listing-12-11/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-11/src/main.rs b/listings/ch12-an-io-project/listing-12-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-12/Cargo.lock b/listings/ch12-an-io-project/listing-12-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-12/Cargo.toml b/listings/ch12-an-io-project/listing-12-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-12/output.txt b/listings/ch12-an-io-project/listing-12-12/output.txt
old mode 100755
new mode 100644
index c189025..6c5e67b
--- a/listings/ch12-an-io-project/listing-12-12/output.txt
+++ b/listings/ch12-an-io-project/listing-12-12/output.txt
@@ -1,16 +1,20 @@
-$ cargo run the poem.txt
+$ cargo run -- the poem.txt
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
 warning: unused `Result` that must be used
   --> src/main.rs:19:5
    |
 19 |     run(config);
-   |     ^^^^^^^^^^^^
+   |     ^^^^^^^^^^^
    |
-   = note: `#[warn(unused_must_use)]` on by default
    = note: this `Result` may be an `Err` variant, which should be handled
+   = note: `#[warn(unused_must_use)]` on by default
+help: use `let _ = ...` to ignore the resulting value
+   |
+19 |     let _ = run(config);
+   |     +++++++
 
 warning: `minigrep` (bin "minigrep") generated 1 warning
-    Finished dev [unoptimized + debuginfo] target(s) in 0.71s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.71s
      Running `target/debug/minigrep the poem.txt`
 Searching for the
 In file poem.txt
diff --git a/listings/ch12-an-io-project/listing-12-12/poem.txt b/listings/ch12-an-io-project/listing-12-12/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-12/src/main.rs b/listings/ch12-an-io-project/listing-12-12/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-13/Cargo.lock b/listings/ch12-an-io-project/listing-12-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-13/Cargo.toml b/listings/ch12-an-io-project/listing-12-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-13/poem.txt b/listings/ch12-an-io-project/listing-12-13/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-13/src/lib.rs b/listings/ch12-an-io-project/listing-12-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-13/src/main.rs b/listings/ch12-an-io-project/listing-12-13/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-14/Cargo.lock b/listings/ch12-an-io-project/listing-12-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-14/Cargo.toml b/listings/ch12-an-io-project/listing-12-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-14/poem.txt b/listings/ch12-an-io-project/listing-12-14/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-14/src/lib.rs b/listings/ch12-an-io-project/listing-12-14/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-14/src/main.rs b/listings/ch12-an-io-project/listing-12-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-15/Cargo.lock b/listings/ch12-an-io-project/listing-12-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-15/Cargo.toml b/listings/ch12-an-io-project/listing-12-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-15/poem.txt b/listings/ch12-an-io-project/listing-12-15/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-15/src/lib.rs b/listings/ch12-an-io-project/listing-12-15/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-15/src/main.rs b/listings/ch12-an-io-project/listing-12-15/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-16/Cargo.lock b/listings/ch12-an-io-project/listing-12-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-16/Cargo.toml b/listings/ch12-an-io-project/listing-12-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-16/output.txt b/listings/ch12-an-io-project/listing-12-16/output.txt
old mode 100755
new mode 100644
index 3c34e39..9f4c64d
--- a/listings/ch12-an-io-project/listing-12-16/output.txt
+++ b/listings/ch12-an-io-project/listing-12-16/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished test [unoptimized + debuginfo] target(s) in 0.97s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.97s
      Running unittests src/lib.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
 
 running 1 test
@@ -9,9 +9,10 @@ test tests::one_result ... FAILED
 failures:
 
 ---- tests::one_result stdout ----
-thread 'main' panicked at 'assertion failed: `(left == right)`
-  left: `["safe, fast, productive."]`,
- right: `[]`', src/lib.rs:44:9
+thread 'tests::one_result' panicked at src/lib.rs:44:9:
+assertion `left == right` failed
+  left: ["safe, fast, productive."]
+ right: []
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch12-an-io-project/listing-12-16/poem.txt b/listings/ch12-an-io-project/listing-12-16/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-16/src/lib.rs b/listings/ch12-an-io-project/listing-12-16/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-16/src/main.rs b/listings/ch12-an-io-project/listing-12-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-17/Cargo.lock b/listings/ch12-an-io-project/listing-12-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-17/Cargo.toml b/listings/ch12-an-io-project/listing-12-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-17/poem.txt b/listings/ch12-an-io-project/listing-12-17/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-17/src/lib.rs b/listings/ch12-an-io-project/listing-12-17/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-17/src/main.rs b/listings/ch12-an-io-project/listing-12-17/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-18/Cargo.lock b/listings/ch12-an-io-project/listing-12-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-18/Cargo.toml b/listings/ch12-an-io-project/listing-12-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-18/poem.txt b/listings/ch12-an-io-project/listing-12-18/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-18/src/lib.rs b/listings/ch12-an-io-project/listing-12-18/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-18/src/main.rs b/listings/ch12-an-io-project/listing-12-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-19/Cargo.lock b/listings/ch12-an-io-project/listing-12-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-19/Cargo.toml b/listings/ch12-an-io-project/listing-12-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-19/output.txt b/listings/ch12-an-io-project/listing-12-19/output.txt
old mode 100755
new mode 100644
index 9b2078c..ed87e4f
--- a/listings/ch12-an-io-project/listing-12-19/output.txt
+++ b/listings/ch12-an-io-project/listing-12-19/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished test [unoptimized + debuginfo] target(s) in 1.22s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 1.22s
      Running unittests src/lib.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
 
 running 1 test
diff --git a/listings/ch12-an-io-project/listing-12-19/poem.txt b/listings/ch12-an-io-project/listing-12-19/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-19/src/lib.rs b/listings/ch12-an-io-project/listing-12-19/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-19/src/main.rs b/listings/ch12-an-io-project/listing-12-19/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-20/Cargo.lock b/listings/ch12-an-io-project/listing-12-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-20/Cargo.toml b/listings/ch12-an-io-project/listing-12-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-20/poem.txt b/listings/ch12-an-io-project/listing-12-20/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-20/src/lib.rs b/listings/ch12-an-io-project/listing-12-20/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-20/src/main.rs b/listings/ch12-an-io-project/listing-12-20/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-21/Cargo.lock b/listings/ch12-an-io-project/listing-12-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-21/Cargo.toml b/listings/ch12-an-io-project/listing-12-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-21/output.txt b/listings/ch12-an-io-project/listing-12-21/output.txt
old mode 100755
new mode 100644
index dafeb78..945df3f
--- a/listings/ch12-an-io-project/listing-12-21/output.txt
+++ b/listings/ch12-an-io-project/listing-12-21/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished test [unoptimized + debuginfo] target(s) in 1.33s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 1.33s
      Running unittests src/lib.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
 
 running 2 tests
diff --git a/listings/ch12-an-io-project/listing-12-21/poem.txt b/listings/ch12-an-io-project/listing-12-21/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-21/src/lib.rs b/listings/ch12-an-io-project/listing-12-21/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-21/src/main.rs b/listings/ch12-an-io-project/listing-12-21/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-22/Cargo.lock b/listings/ch12-an-io-project/listing-12-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-22/Cargo.toml b/listings/ch12-an-io-project/listing-12-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-22/poem.txt b/listings/ch12-an-io-project/listing-12-22/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-22/src/lib.rs b/listings/ch12-an-io-project/listing-12-22/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-22/src/main.rs b/listings/ch12-an-io-project/listing-12-22/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-23/Cargo.lock b/listings/ch12-an-io-project/listing-12-23/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-23/Cargo.toml b/listings/ch12-an-io-project/listing-12-23/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-23/output.txt b/listings/ch12-an-io-project/listing-12-23/output.txt
old mode 100755
new mode 100644
index eaffc2f..5c6fc0c
--- a/listings/ch12-an-io-project/listing-12-23/output.txt
+++ b/listings/ch12-an-io-project/listing-12-23/output.txt
@@ -1,6 +1,6 @@
 $ cargo run -- to poem.txt
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.0s
      Running `target/debug/minigrep to poem.txt`
 Are you nobody, too?
 How dreary to be somebody!
diff --git a/listings/ch12-an-io-project/listing-12-23/poem.txt b/listings/ch12-an-io-project/listing-12-23/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-23/src/lib.rs b/listings/ch12-an-io-project/listing-12-23/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-23/src/main.rs b/listings/ch12-an-io-project/listing-12-23/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-24/Cargo.lock b/listings/ch12-an-io-project/listing-12-24/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-24/Cargo.toml b/listings/ch12-an-io-project/listing-12-24/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-24/poem.txt b/listings/ch12-an-io-project/listing-12-24/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-24/src/lib.rs b/listings/ch12-an-io-project/listing-12-24/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/listing-12-24/src/main.rs b/listings/ch12-an-io-project/listing-12-24/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.lock b/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.toml b/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/poem.txt b/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/src/main.rs b/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.lock b/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.toml b/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-02-using-search-in-run/output.txt b/listings/ch12-an-io-project/no-listing-02-using-search-in-run/output.txt
old mode 100755
new mode 100644
index a5a4ef8..44b2036
--- a/listings/ch12-an-io-project/no-listing-02-using-search-in-run/output.txt
+++ b/listings/ch12-an-io-project/no-listing-02-using-search-in-run/output.txt
@@ -1,5 +1,5 @@
 $ cargo run -- frog poem.txt
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.38s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
      Running `target/debug/minigrep frog poem.txt`
 How public, like a frog
diff --git a/listings/ch12-an-io-project/no-listing-02-using-search-in-run/poem.txt b/listings/ch12-an-io-project/no-listing-02-using-search-in-run/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/lib.rs b/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/main.rs b/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-01-with-args/Cargo.lock b/listings/ch12-an-io-project/output-only-01-with-args/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-01-with-args/Cargo.toml b/listings/ch12-an-io-project/output-only-01-with-args/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-01-with-args/output.txt b/listings/ch12-an-io-project/output-only-01-with-args/output.txt
old mode 100755
new mode 100644
index b48bb0e..5f733a7
--- a/listings/ch12-an-io-project/output-only-01-with-args/output.txt
+++ b/listings/ch12-an-io-project/output-only-01-with-args/output.txt
@@ -1,8 +1,8 @@
 $ cargo run -- needle haystack
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 1.57s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.57s
      Running `target/debug/minigrep needle haystack`
-[src/main.rs:5] args = [
+[src/main.rs:5:5] args = [
     "target/debug/minigrep",
     "needle",
     "haystack",
diff --git a/listings/ch12-an-io-project/output-only-01-with-args/src/main.rs b/listings/ch12-an-io-project/output-only-01-with-args/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock b/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml b/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt b/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt
old mode 100755
new mode 100644
index 93116dd..7e46576
--- a/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt
+++ b/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt
@@ -13,4 +13,4 @@ help: consider introducing a named lifetime parameter
    |              ++++         ++                 ++              ++
 
 For more information about this error, try `rustc --explain E0106`.
-error: could not compile `minigrep` due to previous error
+error: could not compile `minigrep` (lib) due to 1 previous error
diff --git a/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt b/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs b/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs b/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.lock b/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.toml b/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-03-multiple-matches/output.txt b/listings/ch12-an-io-project/output-only-03-multiple-matches/output.txt
old mode 100755
new mode 100644
index b468357..704df25
--- a/listings/ch12-an-io-project/output-only-03-multiple-matches/output.txt
+++ b/listings/ch12-an-io-project/output-only-03-multiple-matches/output.txt
@@ -1,6 +1,6 @@
 $ cargo run -- body poem.txt
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.0s
      Running `target/debug/minigrep body poem.txt`
 I'm nobody! Who are you?
 Are you nobody, too?
diff --git a/listings/ch12-an-io-project/output-only-03-multiple-matches/poem.txt b/listings/ch12-an-io-project/output-only-03-multiple-matches/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-03-multiple-matches/src/lib.rs b/listings/ch12-an-io-project/output-only-03-multiple-matches/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-03-multiple-matches/src/main.rs b/listings/ch12-an-io-project/output-only-03-multiple-matches/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.lock b/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.toml b/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-04-no-matches/output.txt b/listings/ch12-an-io-project/output-only-04-no-matches/output.txt
old mode 100755
new mode 100644
index a53624f..57f3a61
--- a/listings/ch12-an-io-project/output-only-04-no-matches/output.txt
+++ b/listings/ch12-an-io-project/output-only-04-no-matches/output.txt
@@ -1,4 +1,4 @@
 $ cargo run -- monomorphization poem.txt
    Compiling minigrep v0.1.0 (file:///projects/minigrep)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.0s
      Running `target/debug/minigrep monomorphization poem.txt`
diff --git a/listings/ch12-an-io-project/output-only-04-no-matches/poem.txt b/listings/ch12-an-io-project/output-only-04-no-matches/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-04-no-matches/src/lib.rs b/listings/ch12-an-io-project/output-only-04-no-matches/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch12-an-io-project/output-only-04-no-matches/src/main.rs b/listings/ch12-an-io-project/output-only-04-no-matches/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.lock b/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.toml b/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-23-reproduced/poem.txt b/listings/ch13-functional-features/listing-12-23-reproduced/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-23-reproduced/src/lib.rs b/listings/ch13-functional-features/listing-12-23-reproduced/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-23-reproduced/src/main.rs b/listings/ch13-functional-features/listing-12-23-reproduced/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.lock b/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.toml b/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-24-reproduced/poem.txt b/listings/ch13-functional-features/listing-12-24-reproduced/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-24-reproduced/src/lib.rs b/listings/ch13-functional-features/listing-12-24-reproduced/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-12-24-reproduced/src/main.rs b/listings/ch13-functional-features/listing-12-24-reproduced/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-01/Cargo.lock b/listings/ch13-functional-features/listing-13-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-01/Cargo.toml b/listings/ch13-functional-features/listing-13-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-01/output.txt b/listings/ch13-functional-features/listing-13-01/output.txt
old mode 100755
new mode 100644
index b64a4d8..28c829f
--- a/listings/ch13-functional-features/listing-13-01/output.txt
+++ b/listings/ch13-functional-features/listing-13-01/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling shirt-company v0.1.0 (file:///projects/shirt-company)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.27s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
      Running `target/debug/shirt-company`
 The user with preference Some(Red) gets Red
 The user with preference None gets Blue
diff --git a/listings/ch13-functional-features/listing-13-01/src/main.rs b/listings/ch13-functional-features/listing-13-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-02/Cargo.lock b/listings/ch13-functional-features/listing-13-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-02/Cargo.toml b/listings/ch13-functional-features/listing-13-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-02/src/main.rs b/listings/ch13-functional-features/listing-13-02/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-03/Cargo.lock b/listings/ch13-functional-features/listing-13-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-03/Cargo.toml b/listings/ch13-functional-features/listing-13-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-03/output.txt b/listings/ch13-functional-features/listing-13-03/output.txt
old mode 100755
new mode 100644
index 68838de..16716c3
--- a/listings/ch13-functional-features/listing-13-03/output.txt
+++ b/listings/ch13-functional-features/listing-13-03/output.txt
@@ -6,9 +6,16 @@ error[E0308]: mismatched types
 5 |     let n = example_closure(5);
   |             --------------- ^- help: try using a conversion method: `.to_string()`
   |             |               |
-  |             |               expected struct `String`, found integer
+  |             |               expected `String`, found integer
   |             arguments to this function are incorrect
   |
+note: expected because the closure was earlier called with an argument of type `String`
+ --> src/main.rs:4:29
+  |
+4 |     let s = example_closure(String::from("hello"));
+  |             --------------- ^^^^^^^^^^^^^^^^^^^^^ expected because this argument is of type `String`
+  |             |
+  |             in this closure call
 note: closure parameter defined here
  --> src/main.rs:2:28
   |
@@ -16,4 +23,4 @@ note: closure parameter defined here
   |                            ^
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `closure-example` due to previous error
+error: could not compile `closure-example` (bin "closure-example") due to 1 previous error
diff --git a/listings/ch13-functional-features/listing-13-03/src/main.rs b/listings/ch13-functional-features/listing-13-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-04/Cargo.lock b/listings/ch13-functional-features/listing-13-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-04/Cargo.toml b/listings/ch13-functional-features/listing-13-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-04/output.txt b/listings/ch13-functional-features/listing-13-04/output.txt
old mode 100755
new mode 100644
index 64d763b..fd33cb7
--- a/listings/ch13-functional-features/listing-13-04/output.txt
+++ b/listings/ch13-functional-features/listing-13-04/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling closure-example v0.1.0 (file:///projects/closure-example)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.43s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
      Running `target/debug/closure-example`
 Before defining closure: [1, 2, 3]
 Before calling closure: [1, 2, 3]
diff --git a/listings/ch13-functional-features/listing-13-04/src/main.rs b/listings/ch13-functional-features/listing-13-04/src/main.rs
old mode 100755
new mode 100644
index 43b91bb..19f51a6
--- a/listings/ch13-functional-features/listing-13-04/src/main.rs
+++ b/listings/ch13-functional-features/listing-13-04/src/main.rs
@@ -1,10 +1,10 @@
 fn main() {
     let list = vec![1, 2, 3];
-    println!("Before defining closure: {:?}", list);
+    println!("Before defining closure: {list:?}");
 
-    let only_borrows = || println!("From closure: {:?}", list);
+    let only_borrows = || println!("From closure: {list:?}");
 
-    println!("Before calling closure: {:?}", list);
+    println!("Before calling closure: {list:?}");
     only_borrows();
-    println!("After calling closure: {:?}", list);
+    println!("After calling closure: {list:?}");
 }
diff --git a/listings/ch13-functional-features/listing-13-05/Cargo.lock b/listings/ch13-functional-features/listing-13-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-05/Cargo.toml b/listings/ch13-functional-features/listing-13-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-05/output.txt b/listings/ch13-functional-features/listing-13-05/output.txt
old mode 100755
new mode 100644
index ce0ad5e..af22182
--- a/listings/ch13-functional-features/listing-13-05/output.txt
+++ b/listings/ch13-functional-features/listing-13-05/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling closure-example v0.1.0 (file:///projects/closure-example)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.43s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
      Running `target/debug/closure-example`
 Before defining closure: [1, 2, 3]
 After calling closure: [1, 2, 3, 7]
diff --git a/listings/ch13-functional-features/listing-13-05/src/main.rs b/listings/ch13-functional-features/listing-13-05/src/main.rs
old mode 100755
new mode 100644
index 37f8130..f6c2a53
--- a/listings/ch13-functional-features/listing-13-05/src/main.rs
+++ b/listings/ch13-functional-features/listing-13-05/src/main.rs
@@ -1,9 +1,9 @@
 fn main() {
     let mut list = vec![1, 2, 3];
-    println!("Before defining closure: {:?}", list);
+    println!("Before defining closure: {list:?}");
 
     let mut borrows_mutably = || list.push(7);
 
     borrows_mutably();
-    println!("After calling closure: {:?}", list);
+    println!("After calling closure: {list:?}");
 }
diff --git a/listings/ch13-functional-features/listing-13-06/Cargo.lock b/listings/ch13-functional-features/listing-13-06/Cargo.lock
deleted file mode 100755
index 75ff09e..0000000
--- a/listings/ch13-functional-features/listing-13-06/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "workout-app"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-06/Cargo.toml b/listings/ch13-functional-features/listing-13-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-06/src/main.rs b/listings/ch13-functional-features/listing-13-06/src/main.rs
old mode 100755
new mode 100644
index 2c8e18c..ee9ca04
--- a/listings/ch13-functional-features/listing-13-06/src/main.rs
+++ b/listings/ch13-functional-features/listing-13-06/src/main.rs
@@ -2,9 +2,9 @@ use std::thread;
 
 fn main() {
     let list = vec![1, 2, 3];
-    println!("Before defining closure: {:?}", list);
+    println!("Before defining closure: {list:?}");
 
-    thread::spawn(move || println!("From thread: {:?}", list))
+    thread::spawn(move || println!("From thread: {list:?}"))
         .join()
         .unwrap();
 }
diff --git a/listings/ch13-functional-features/listing-13-07/.rustfmt.toml b/listings/ch13-functional-features/listing-13-07/.rustfmt.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-07/Cargo.lock b/listings/ch13-functional-features/listing-13-07/Cargo.lock
deleted file mode 100755
index 75ff09e..0000000
--- a/listings/ch13-functional-features/listing-13-07/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "workout-app"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-07/Cargo.toml b/listings/ch13-functional-features/listing-13-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-07/output.txt b/listings/ch13-functional-features/listing-13-07/output.txt
old mode 100755
new mode 100644
index f18fce4..8c11d84
--- a/listings/ch13-functional-features/listing-13-07/output.txt
+++ b/listings/ch13-functional-features/listing-13-07/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling rectangles v0.1.0 (file:///projects/rectangles)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.41s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
      Running `target/debug/rectangles`
 [
     Rectangle {
diff --git a/listings/ch13-functional-features/listing-13-07/src/main.rs b/listings/ch13-functional-features/listing-13-07/src/main.rs
old mode 100755
new mode 100644
index 73a25e5..e7ab8d3
--- a/listings/ch13-functional-features/listing-13-07/src/main.rs
+++ b/listings/ch13-functional-features/listing-13-07/src/main.rs
@@ -12,5 +12,5 @@ fn main() {
     ];
 
     list.sort_by_key(|r| r.width);
-    println!("{:#?}", list);
+    println!("{list:#?}");
 }
diff --git a/listings/ch13-functional-features/listing-13-08/.rustfmt.toml b/listings/ch13-functional-features/listing-13-08/.rustfmt.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-08/Cargo.lock b/listings/ch13-functional-features/listing-13-08/Cargo.lock
deleted file mode 100755
index c190d3a..0000000
--- a/listings/ch13-functional-features/listing-13-08/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "closure-example"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-08/Cargo.toml b/listings/ch13-functional-features/listing-13-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-08/output.txt b/listings/ch13-functional-features/listing-13-08/output.txt
old mode 100755
new mode 100644
index a910537..7f5ce88
--- a/listings/ch13-functional-features/listing-13-08/output.txt
+++ b/listings/ch13-functional-features/listing-13-08/output.txt
@@ -3,7 +3,7 @@ $ cargo run
 error[E0507]: cannot move out of `value`, a captured variable in an `FnMut` closure
   --> src/main.rs:18:30
    |
-15 |     let value = String::from("by key called");
+15 |     let value = String::from("closure called");
    |         ----- captured outer variable
 16 |
 17 |     list.sort_by_key(|r| {
@@ -12,4 +12,4 @@ error[E0507]: cannot move out of `value`, a captured variable in an `FnMut` clos
    |                              ^^^^^ move occurs because `value` has type `String`, which does not implement the `Copy` trait
 
 For more information about this error, try `rustc --explain E0507`.
-error: could not compile `rectangles` due to previous error
+error: could not compile `rectangles` (bin "rectangles") due to 1 previous error
diff --git a/listings/ch13-functional-features/listing-13-08/src/main.rs b/listings/ch13-functional-features/listing-13-08/src/main.rs
old mode 100755
new mode 100644
index 3b9c9cb..e00fec7
--- a/listings/ch13-functional-features/listing-13-08/src/main.rs
+++ b/listings/ch13-functional-features/listing-13-08/src/main.rs
@@ -12,11 +12,11 @@ fn main() {
     ];
 
     let mut sort_operations = vec![];
-    let value = String::from("by key called");
+    let value = String::from("closure called");
 
     list.sort_by_key(|r| {
         sort_operations.push(value);
         r.width
     });
-    println!("{:#?}", list);
+    println!("{list:#?}");
 }
diff --git a/listings/ch13-functional-features/listing-13-09/.rustfmt.toml b/listings/ch13-functional-features/listing-13-09/.rustfmt.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-09/Cargo.lock b/listings/ch13-functional-features/listing-13-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-09/Cargo.toml b/listings/ch13-functional-features/listing-13-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-09/src/main.rs b/listings/ch13-functional-features/listing-13-09/src/main.rs
old mode 100755
new mode 100644
index a60d6fd..f007e3c
--- a/listings/ch13-functional-features/listing-13-09/src/main.rs
+++ b/listings/ch13-functional-features/listing-13-09/src/main.rs
@@ -16,5 +16,5 @@ fn main() {
         num_sort_operations += 1;
         r.width
     });
-    println!("{:#?}, sorted in {num_sort_operations} operations", list);
+    println!("{list:#?}, sorted in {num_sort_operations} operations");
 }
diff --git a/listings/ch13-functional-features/listing-13-10/Cargo.lock b/listings/ch13-functional-features/listing-13-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-10/Cargo.toml b/listings/ch13-functional-features/listing-13-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-10/src/main.rs b/listings/ch13-functional-features/listing-13-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-11/Cargo.lock b/listings/ch13-functional-features/listing-13-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-11/Cargo.toml b/listings/ch13-functional-features/listing-13-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-11/src/main.rs b/listings/ch13-functional-features/listing-13-11/src/main.rs
old mode 100755
new mode 100644
index 712aff4..b4e8516
--- a/listings/ch13-functional-features/listing-13-11/src/main.rs
+++ b/listings/ch13-functional-features/listing-13-11/src/main.rs
@@ -5,7 +5,7 @@ fn main() {
     let v1_iter = v1.iter();
 
     for val in v1_iter {
-        println!("Got: {}", val);
+        println!("Got: {val}");
     }
     // ANCHOR_END: here
 }
diff --git a/listings/ch13-functional-features/listing-13-12/Cargo.lock b/listings/ch13-functional-features/listing-13-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-12/Cargo.toml b/listings/ch13-functional-features/listing-13-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-12/src/lib.rs b/listings/ch13-functional-features/listing-13-12/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-12/src/main.rs b/listings/ch13-functional-features/listing-13-12/src/main.rs
deleted file mode 100755
index 7352b80..0000000
--- a/listings/ch13-functional-features/listing-13-12/src/main.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-fn main() {
-    let x = 4;
-
-    let equal_to_x = |z| z == x;
-
-    let y = 4;
-
-    assert!(equal_to_x(y));
-}
diff --git a/listings/ch13-functional-features/listing-13-13/Cargo.lock b/listings/ch13-functional-features/listing-13-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-13/Cargo.toml b/listings/ch13-functional-features/listing-13-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-13/src/lib.rs b/listings/ch13-functional-features/listing-13-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-13/src/main.rs b/listings/ch13-functional-features/listing-13-13/src/main.rs
deleted file mode 100755
index 55a0dd3..0000000
--- a/listings/ch13-functional-features/listing-13-13/src/main.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-fn main() {
-    // ANCHOR: here
-    let v1 = vec![1, 2, 3];
-
-    let v1_iter = v1.iter();
-    // ANCHOR_END: here
-}
diff --git a/listings/ch13-functional-features/listing-13-14/Cargo.lock b/listings/ch13-functional-features/listing-13-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-14/Cargo.toml b/listings/ch13-functional-features/listing-13-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-14/output.txt b/listings/ch13-functional-features/listing-13-14/output.txt
old mode 100755
new mode 100644
index 228c764..d46dd5c
--- a/listings/ch13-functional-features/listing-13-14/output.txt
+++ b/listings/ch13-functional-features/listing-13-14/output.txt
@@ -4,11 +4,15 @@ warning: unused `Map` that must be used
  --> src/main.rs:4:5
   |
 4 |     v1.iter().map(|x| x + 1);
-  |     ^^^^^^^^^^^^^^^^^^^^^^^^^
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
-  = note: `#[warn(unused_must_use)]` on by default
   = note: iterators are lazy and do nothing unless consumed
+  = note: `#[warn(unused_must_use)]` on by default
+help: use `let _ = ...` to ignore the resulting value
+  |
+4 |     let _ = v1.iter().map(|x| x + 1);
+  |     +++++++
 
 warning: `iterators` (bin "iterators") generated 1 warning
-    Finished dev [unoptimized + debuginfo] target(s) in 0.47s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.47s
      Running `target/debug/iterators`
diff --git a/listings/ch13-functional-features/listing-13-14/src/main.rs b/listings/ch13-functional-features/listing-13-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-15/Cargo.lock b/listings/ch13-functional-features/listing-13-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-15/Cargo.toml b/listings/ch13-functional-features/listing-13-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-15/src/lib.rs b/listings/ch13-functional-features/listing-13-15/src/lib.rs
deleted file mode 100755
index 7582840..0000000
--- a/listings/ch13-functional-features/listing-13-15/src/lib.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-#[cfg(test)]
-mod tests {
-    // ANCHOR: here
-    #[test]
-    fn iterator_demonstration() {
-        let v1 = vec![1, 2, 3];
-
-        let mut v1_iter = v1.iter();
-
-        assert_eq!(v1_iter.next(), Some(&1));
-        assert_eq!(v1_iter.next(), Some(&2));
-        assert_eq!(v1_iter.next(), Some(&3));
-        assert_eq!(v1_iter.next(), None);
-    }
-    // ANCHOR_END: here
-}
diff --git a/listings/ch13-functional-features/listing-13-15/src/main.rs b/listings/ch13-functional-features/listing-13-15/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-16/Cargo.lock b/listings/ch13-functional-features/listing-13-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-16/Cargo.toml b/listings/ch13-functional-features/listing-13-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-16/src/lib.rs b/listings/ch13-functional-features/listing-13-16/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-17/Cargo.lock b/listings/ch13-functional-features/listing-13-17/Cargo.lock
deleted file mode 100755
index e91eaa8..0000000
--- a/listings/ch13-functional-features/listing-13-17/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "iterators"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-17/Cargo.toml b/listings/ch13-functional-features/listing-13-17/Cargo.toml
deleted file mode 100755
index 2652a8a..0000000
--- a/listings/ch13-functional-features/listing-13-17/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "iterators"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/listing-13-17/output.txt b/listings/ch13-functional-features/listing-13-17/output.txt
deleted file mode 100755
index 228c764..0000000
--- a/listings/ch13-functional-features/listing-13-17/output.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-$ cargo run
-   Compiling iterators v0.1.0 (file:///projects/iterators)
-warning: unused `Map` that must be used
- --> src/main.rs:4:5
-  |
-4 |     v1.iter().map(|x| x + 1);
-  |     ^^^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: `#[warn(unused_must_use)]` on by default
-  = note: iterators are lazy and do nothing unless consumed
-
-warning: `iterators` (bin "iterators") generated 1 warning
-    Finished dev [unoptimized + debuginfo] target(s) in 0.47s
-     Running `target/debug/iterators`
diff --git a/listings/ch13-functional-features/listing-13-17/src/main.rs b/listings/ch13-functional-features/listing-13-17/src/main.rs
deleted file mode 100755
index 62a68be..0000000
--- a/listings/ch13-functional-features/listing-13-17/src/main.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-fn main() {
-    // ANCHOR: here
-    let v1: Vec<i32> = vec![1, 2, 3];
-
-    v1.iter().map(|x| x + 1);
-    // ANCHOR_END: here
-}
diff --git a/listings/ch13-functional-features/listing-13-18/Cargo.lock b/listings/ch13-functional-features/listing-13-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-18/Cargo.toml b/listings/ch13-functional-features/listing-13-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-18/poem.txt b/listings/ch13-functional-features/listing-13-18/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-18/src/lib.rs b/listings/ch13-functional-features/listing-13-18/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-18/src/main.rs b/listings/ch13-functional-features/listing-13-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-19/Cargo.lock b/listings/ch13-functional-features/listing-13-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-19/Cargo.toml b/listings/ch13-functional-features/listing-13-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-19/poem.txt b/listings/ch13-functional-features/listing-13-19/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-19/src/lib.rs b/listings/ch13-functional-features/listing-13-19/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-19/src/main.rs b/listings/ch13-functional-features/listing-13-19/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-20/Cargo.lock b/listings/ch13-functional-features/listing-13-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-20/Cargo.toml b/listings/ch13-functional-features/listing-13-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-20/poem.txt b/listings/ch13-functional-features/listing-13-20/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-20/src/lib.rs b/listings/ch13-functional-features/listing-13-20/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-20/src/main.rs b/listings/ch13-functional-features/listing-13-20/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-21/Cargo.lock b/listings/ch13-functional-features/listing-13-21/Cargo.lock
deleted file mode 100755
index 58b70c5..0000000
--- a/listings/ch13-functional-features/listing-13-21/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "counter"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-21/Cargo.toml b/listings/ch13-functional-features/listing-13-21/Cargo.toml
deleted file mode 100755
index 9e103f3..0000000
--- a/listings/ch13-functional-features/listing-13-21/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "counter"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/listing-13-21/src/lib.rs b/listings/ch13-functional-features/listing-13-21/src/lib.rs
deleted file mode 100755
index 35ea8e5..0000000
--- a/listings/ch13-functional-features/listing-13-21/src/lib.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-struct Counter {
-    count: u32,
-}
-
-impl Counter {
-    fn new() -> Counter {
-        Counter { count: 0 }
-    }
-}
-
-// ANCHOR: here
-impl Iterator for Counter {
-    type Item = u32;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        if self.count < 5 {
-            self.count += 1;
-            Some(self.count)
-        } else {
-            None
-        }
-    }
-}
-// ANCHOR_END: here
diff --git a/listings/ch13-functional-features/listing-13-22/Cargo.lock b/listings/ch13-functional-features/listing-13-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-22/Cargo.toml b/listings/ch13-functional-features/listing-13-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-22/poem.txt b/listings/ch13-functional-features/listing-13-22/poem.txt
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-22/src/lib.rs b/listings/ch13-functional-features/listing-13-22/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-22/src/main.rs b/listings/ch13-functional-features/listing-13-22/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch13-functional-features/listing-13-23/Cargo.lock b/listings/ch13-functional-features/listing-13-23/Cargo.lock
deleted file mode 100755
index 58b70c5..0000000
--- a/listings/ch13-functional-features/listing-13-23/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "counter"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-23/Cargo.toml b/listings/ch13-functional-features/listing-13-23/Cargo.toml
deleted file mode 100755
index 9e103f3..0000000
--- a/listings/ch13-functional-features/listing-13-23/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "counter"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/listing-13-23/src/lib.rs b/listings/ch13-functional-features/listing-13-23/src/lib.rs
deleted file mode 100755
index f04d730..0000000
--- a/listings/ch13-functional-features/listing-13-23/src/lib.rs
+++ /dev/null
@@ -1,51 +0,0 @@
-struct Counter {
-    count: u32,
-}
-
-impl Counter {
-    fn new() -> Counter {
-        Counter { count: 0 }
-    }
-}
-
-impl Iterator for Counter {
-    type Item = u32;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        if self.count < 5 {
-            self.count += 1;
-            Some(self.count)
-        } else {
-            None
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn calling_next_directly() {
-        let mut counter = Counter::new();
-
-        assert_eq!(counter.next(), Some(1));
-        assert_eq!(counter.next(), Some(2));
-        assert_eq!(counter.next(), Some(3));
-        assert_eq!(counter.next(), Some(4));
-        assert_eq!(counter.next(), Some(5));
-        assert_eq!(counter.next(), None);
-    }
-
-    // ANCHOR: here
-    #[test]
-    fn using_other_iterator_trait_methods() {
-        let sum: u32 = Counter::new()
-            .zip(Counter::new().skip(1))
-            .map(|(a, b)| a * b)
-            .filter(|x| x % 3 == 0)
-            .sum();
-        assert_eq!(18, sum);
-    }
-    // ANCHOR_END: here
-}
diff --git a/listings/ch13-functional-features/listing-13-25/Cargo.lock b/listings/ch13-functional-features/listing-13-25/Cargo.lock
deleted file mode 100755
index 88bf82d..0000000
--- a/listings/ch13-functional-features/listing-13-25/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "minigrep"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-25/Cargo.toml b/listings/ch13-functional-features/listing-13-25/Cargo.toml
deleted file mode 100755
index 64c2a3f..0000000
--- a/listings/ch13-functional-features/listing-13-25/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "minigrep"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/listing-13-25/poem.txt b/listings/ch13-functional-features/listing-13-25/poem.txt
deleted file mode 100755
index 8707527..0000000
--- a/listings/ch13-functional-features/listing-13-25/poem.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-I'm nobody! Who are you?
-Are you nobody, too?
-Then there's a pair of us - don't tell!
-They'd banish us, you know.
-
-How dreary to be somebody!
-How public, like a frog
-To tell your name the livelong day
-To an admiring bog!
diff --git a/listings/ch13-functional-features/listing-13-25/src/lib.rs b/listings/ch13-functional-features/listing-13-25/src/lib.rs
deleted file mode 100755
index fe1dccf..0000000
--- a/listings/ch13-functional-features/listing-13-25/src/lib.rs
+++ /dev/null
@@ -1,104 +0,0 @@
-use std::env;
-use std::error::Error;
-use std::fs;
-
-pub struct Config {
-    pub query: String,
-    pub filename: String,
-    pub case_sensitive: bool,
-}
-
-impl Config {
-    pub fn new(args: &[String]) -> Result<Config, &'static str> {
-        if args.len() < 3 {
-            return Err("not enough arguments");
-        }
-
-        let query = args[1].clone();
-        let filename = args[2].clone();
-
-        let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
-
-        Ok(Config {
-            query,
-            filename,
-            case_sensitive,
-        })
-    }
-}
-
-pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
-    let contents = fs::read_to_string(config.filename)?;
-
-    let results = if config.case_sensitive {
-        search(&config.query, &contents)
-    } else {
-        search_case_insensitive(&config.query, &contents)
-    };
-
-    for line in results {
-        println!("{}", line);
-    }
-
-    Ok(())
-}
-
-pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
-    let mut results = Vec::new();
-
-    for line in contents.lines() {
-        if line.contains(query) {
-            results.push(line);
-        }
-    }
-
-    results
-}
-
-pub fn search_case_insensitive<'a>(
-    query: &str,
-    contents: &'a str,
-) -> Vec<&'a str> {
-    let query = query.to_lowercase();
-    let mut results = Vec::new();
-
-    for line in contents.lines() {
-        if line.to_lowercase().contains(&query) {
-            results.push(line);
-        }
-    }
-
-    results
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn case_sensitive() {
-        let query = "duct";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Duct tape.";
-
-        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
-    }
-
-    #[test]
-    fn case_insensitive() {
-        let query = "rUsT";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Trust me.";
-
-        assert_eq!(
-            vec!["Rust:", "Trust me."],
-            search_case_insensitive(query, contents)
-        );
-    }
-}
diff --git a/listings/ch13-functional-features/listing-13-25/src/main.rs b/listings/ch13-functional-features/listing-13-25/src/main.rs
deleted file mode 100755
index d09966e..0000000
--- a/listings/ch13-functional-features/listing-13-25/src/main.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-use std::env;
-use std::process;
-
-use minigrep::Config;
-
-// ANCHOR: here
-fn main() {
-    let config = Config::new(env::args()).unwrap_or_else(|err| {
-        eprintln!("Problem parsing arguments: {}", err);
-        process::exit(1);
-    });
-
-    // --snip--
-    // ANCHOR_END: here
-
-    if let Err(e) = minigrep::run(config) {
-        eprintln!("Application error: {}", e);
-
-        process::exit(1);
-    }
-    // ANCHOR: here
-}
-// ANCHOR_END: here
diff --git a/listings/ch13-functional-features/listing-13-26/Cargo.lock b/listings/ch13-functional-features/listing-13-26/Cargo.lock
deleted file mode 100755
index 88bf82d..0000000
--- a/listings/ch13-functional-features/listing-13-26/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "minigrep"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-26/Cargo.toml b/listings/ch13-functional-features/listing-13-26/Cargo.toml
deleted file mode 100755
index 64c2a3f..0000000
--- a/listings/ch13-functional-features/listing-13-26/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "minigrep"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/listing-13-26/poem.txt b/listings/ch13-functional-features/listing-13-26/poem.txt
deleted file mode 100755
index 8707527..0000000
--- a/listings/ch13-functional-features/listing-13-26/poem.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-I'm nobody! Who are you?
-Are you nobody, too?
-Then there's a pair of us - don't tell!
-They'd banish us, you know.
-
-How dreary to be somebody!
-How public, like a frog
-To tell your name the livelong day
-To an admiring bog!
diff --git a/listings/ch13-functional-features/listing-13-26/src/lib.rs b/listings/ch13-functional-features/listing-13-26/src/lib.rs
deleted file mode 100755
index 2cb0bea..0000000
--- a/listings/ch13-functional-features/listing-13-26/src/lib.rs
+++ /dev/null
@@ -1,107 +0,0 @@
-use std::env;
-use std::error::Error;
-use std::fs;
-
-pub struct Config {
-    pub query: String,
-    pub filename: String,
-    pub case_sensitive: bool,
-}
-
-// ANCHOR: here
-impl Config {
-    pub fn new(mut args: env::Args) -> Result<Config, &'static str> {
-        // --snip--
-        // ANCHOR_END: here
-        if args.len() < 3 {
-            return Err("not enough arguments");
-        }
-
-        let query = args[1].clone();
-        let filename = args[2].clone();
-
-        let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
-
-        Ok(Config {
-            query,
-            filename,
-            case_sensitive,
-        })
-    }
-}
-
-pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
-    let contents = fs::read_to_string(config.filename)?;
-
-    let results = if config.case_sensitive {
-        search(&config.query, &contents)
-    } else {
-        search_case_insensitive(&config.query, &contents)
-    };
-
-    for line in results {
-        println!("{}", line);
-    }
-
-    Ok(())
-}
-
-pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
-    let mut results = Vec::new();
-
-    for line in contents.lines() {
-        if line.contains(query) {
-            results.push(line);
-        }
-    }
-
-    results
-}
-
-pub fn search_case_insensitive<'a>(
-    query: &str,
-    contents: &'a str,
-) -> Vec<&'a str> {
-    let query = query.to_lowercase();
-    let mut results = Vec::new();
-
-    for line in contents.lines() {
-        if line.to_lowercase().contains(&query) {
-            results.push(line);
-        }
-    }
-
-    results
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn case_sensitive() {
-        let query = "duct";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Duct tape.";
-
-        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
-    }
-
-    #[test]
-    fn case_insensitive() {
-        let query = "rUsT";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Trust me.";
-
-        assert_eq!(
-            vec!["Rust:", "Trust me."],
-            search_case_insensitive(query, contents)
-        );
-    }
-}
diff --git a/listings/ch13-functional-features/listing-13-26/src/main.rs b/listings/ch13-functional-features/listing-13-26/src/main.rs
deleted file mode 100755
index 06aac30..0000000
--- a/listings/ch13-functional-features/listing-13-26/src/main.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-use std::env;
-use std::process;
-
-use minigrep::Config;
-
-fn main() {
-    let config = Config::new(env::args()).unwrap_or_else(|err| {
-        eprintln!("Problem parsing arguments: {}", err);
-        process::exit(1);
-    });
-
-    if let Err(e) = minigrep::run(config) {
-        eprintln!("Application error: {}", e);
-
-        process::exit(1);
-    }
-}
diff --git a/listings/ch13-functional-features/listing-13-27/Cargo.lock b/listings/ch13-functional-features/listing-13-27/Cargo.lock
deleted file mode 100755
index 88bf82d..0000000
--- a/listings/ch13-functional-features/listing-13-27/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "minigrep"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-27/Cargo.toml b/listings/ch13-functional-features/listing-13-27/Cargo.toml
deleted file mode 100755
index 64c2a3f..0000000
--- a/listings/ch13-functional-features/listing-13-27/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "minigrep"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/listing-13-27/poem.txt b/listings/ch13-functional-features/listing-13-27/poem.txt
deleted file mode 100755
index 8707527..0000000
--- a/listings/ch13-functional-features/listing-13-27/poem.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-I'm nobody! Who are you?
-Are you nobody, too?
-Then there's a pair of us - don't tell!
-They'd banish us, you know.
-
-How dreary to be somebody!
-How public, like a frog
-To tell your name the livelong day
-To an admiring bog!
diff --git a/listings/ch13-functional-features/listing-13-27/src/lib.rs b/listings/ch13-functional-features/listing-13-27/src/lib.rs
deleted file mode 100755
index 7a33565..0000000
--- a/listings/ch13-functional-features/listing-13-27/src/lib.rs
+++ /dev/null
@@ -1,111 +0,0 @@
-use std::env;
-use std::error::Error;
-use std::fs;
-
-pub struct Config {
-    pub query: String,
-    pub filename: String,
-    pub case_sensitive: bool,
-}
-
-// ANCHOR: here
-impl Config {
-    pub fn new(mut args: env::Args) -> Result<Config, &'static str> {
-        args.next();
-
-        let query = match args.next() {
-            Some(arg) => arg,
-            None => return Err("Didn't get a query string"),
-        };
-
-        let filename = match args.next() {
-            Some(arg) => arg,
-            None => return Err("Didn't get a file name"),
-        };
-
-        let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
-
-        Ok(Config {
-            query,
-            filename,
-            case_sensitive,
-        })
-    }
-}
-// ANCHOR_END: here
-
-pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
-    let contents = fs::read_to_string(config.filename)?;
-
-    let results = if config.case_sensitive {
-        search(&config.query, &contents)
-    } else {
-        search_case_insensitive(&config.query, &contents)
-    };
-
-    for line in results {
-        println!("{}", line);
-    }
-
-    Ok(())
-}
-
-pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
-    let mut results = Vec::new();
-
-    for line in contents.lines() {
-        if line.contains(query) {
-            results.push(line);
-        }
-    }
-
-    results
-}
-
-pub fn search_case_insensitive<'a>(
-    query: &str,
-    contents: &'a str,
-) -> Vec<&'a str> {
-    let query = query.to_lowercase();
-    let mut results = Vec::new();
-
-    for line in contents.lines() {
-        if line.to_lowercase().contains(&query) {
-            results.push(line);
-        }
-    }
-
-    results
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn case_sensitive() {
-        let query = "duct";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Duct tape.";
-
-        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
-    }
-
-    #[test]
-    fn case_insensitive() {
-        let query = "rUsT";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Trust me.";
-
-        assert_eq!(
-            vec!["Rust:", "Trust me."],
-            search_case_insensitive(query, contents)
-        );
-    }
-}
diff --git a/listings/ch13-functional-features/listing-13-27/src/main.rs b/listings/ch13-functional-features/listing-13-27/src/main.rs
deleted file mode 100755
index 06aac30..0000000
--- a/listings/ch13-functional-features/listing-13-27/src/main.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-use std::env;
-use std::process;
-
-use minigrep::Config;
-
-fn main() {
-    let config = Config::new(env::args()).unwrap_or_else(|err| {
-        eprintln!("Problem parsing arguments: {}", err);
-        process::exit(1);
-    });
-
-    if let Err(e) = minigrep::run(config) {
-        eprintln!("Application error: {}", e);
-
-        process::exit(1);
-    }
-}
diff --git a/listings/ch13-functional-features/listing-13-29/Cargo.lock b/listings/ch13-functional-features/listing-13-29/Cargo.lock
deleted file mode 100755
index 88bf82d..0000000
--- a/listings/ch13-functional-features/listing-13-29/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "minigrep"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/listing-13-29/Cargo.toml b/listings/ch13-functional-features/listing-13-29/Cargo.toml
deleted file mode 100755
index 64c2a3f..0000000
--- a/listings/ch13-functional-features/listing-13-29/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "minigrep"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/listing-13-29/poem.txt b/listings/ch13-functional-features/listing-13-29/poem.txt
deleted file mode 100755
index 8707527..0000000
--- a/listings/ch13-functional-features/listing-13-29/poem.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-I'm nobody! Who are you?
-Are you nobody, too?
-Then there's a pair of us - don't tell!
-They'd banish us, you know.
-
-How dreary to be somebody!
-How public, like a frog
-To tell your name the livelong day
-To an admiring bog!
diff --git a/listings/ch13-functional-features/listing-13-29/src/lib.rs b/listings/ch13-functional-features/listing-13-29/src/lib.rs
deleted file mode 100755
index bc8a77e..0000000
--- a/listings/ch13-functional-features/listing-13-29/src/lib.rs
+++ /dev/null
@@ -1,106 +0,0 @@
-use std::env;
-use std::error::Error;
-use std::fs;
-
-pub struct Config {
-    pub query: String,
-    pub filename: String,
-    pub case_sensitive: bool,
-}
-
-impl Config {
-    pub fn new(mut args: std::env::Args) -> Result<Config, &'static str> {
-        args.next();
-
-        let query = match args.next() {
-            Some(arg) => arg,
-            None => return Err("Didn't get a query string"),
-        };
-
-        let filename = match args.next() {
-            Some(arg) => arg,
-            None => return Err("Didn't get a file name"),
-        };
-
-        let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
-
-        Ok(Config {
-            query,
-            filename,
-            case_sensitive,
-        })
-    }
-}
-
-pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
-    let contents = fs::read_to_string(config.filename)?;
-
-    let results = if config.case_sensitive {
-        search(&config.query, &contents)
-    } else {
-        search_case_insensitive(&config.query, &contents)
-    };
-
-    for line in results {
-        println!("{}", line);
-    }
-
-    Ok(())
-}
-
-// ANCHOR: here
-pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
-    contents
-        .lines()
-        .filter(|line| line.contains(query))
-        .collect()
-}
-// ANCHOR_END: here
-
-pub fn search_case_insensitive<'a>(
-    query: &str,
-    contents: &'a str,
-) -> Vec<&'a str> {
-    let query = query.to_lowercase();
-    let mut results = Vec::new();
-
-    for line in contents.lines() {
-        if line.to_lowercase().contains(&query) {
-            results.push(line);
-        }
-    }
-
-    results
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn case_sensitive() {
-        let query = "duct";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Duct tape.";
-
-        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
-    }
-
-    #[test]
-    fn case_insensitive() {
-        let query = "rUsT";
-        let contents = "\
-Rust:
-safe, fast, productive.
-Pick three.
-Trust me.";
-
-        assert_eq!(
-            vec!["Rust:", "Trust me."],
-            search_case_insensitive(query, contents)
-        );
-    }
-}
diff --git a/listings/ch13-functional-features/listing-13-29/src/main.rs b/listings/ch13-functional-features/listing-13-29/src/main.rs
deleted file mode 100755
index 06aac30..0000000
--- a/listings/ch13-functional-features/listing-13-29/src/main.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-use std::env;
-use std::process;
-
-use minigrep::Config;
-
-fn main() {
-    let config = Config::new(env::args()).unwrap_or_else(|err| {
-        eprintln!("Problem parsing arguments: {}", err);
-        process::exit(1);
-    });
-
-    if let Err(e) = minigrep::run(config) {
-        eprintln!("Application error: {}", e);
-
-        process::exit(1);
-    }
-}
diff --git a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/Cargo.lock b/listings/ch13-functional-features/no-listing-01-failing-cacher-test/Cargo.lock
deleted file mode 100755
index e090432..0000000
--- a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "cacher"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/Cargo.toml b/listings/ch13-functional-features/no-listing-01-failing-cacher-test/Cargo.toml
deleted file mode 100755
index 6b81ef9..0000000
--- a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "cacher"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/output.txt b/listings/ch13-functional-features/no-listing-01-failing-cacher-test/output.txt
deleted file mode 100755
index c9bda8c..0000000
--- a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/output.txt
+++ /dev/null
@@ -1,23 +0,0 @@
-$ cargo test
-   Compiling cacher v0.1.0 (file:///projects/cacher)
-    Finished test [unoptimized + debuginfo] target(s) in 0.72s
-     Running unittests (target/debug/deps/cacher-074d7c200c000afa)
-
-running 1 test
-test tests::call_with_different_values ... FAILED
-
-failures:
-
----- tests::call_with_different_values stdout ----
-thread 'main' panicked at 'assertion failed: `(left == right)`
-  left: `1`,
- right: `2`', src/lib.rs:43:9
-note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
-
-
-failures:
-    tests::call_with_different_values
-
-test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
-
-error: test failed, to rerun pass '--lib'
diff --git a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/src/lib.rs b/listings/ch13-functional-features/no-listing-01-failing-cacher-test/src/lib.rs
deleted file mode 100755
index e7d677d..0000000
--- a/listings/ch13-functional-features/no-listing-01-failing-cacher-test/src/lib.rs
+++ /dev/null
@@ -1,47 +0,0 @@
-struct Cacher<T>
-where
-    T: Fn(u32) -> u32,
-{
-    calculation: T,
-    value: Option<u32>,
-}
-
-impl<T> Cacher<T>
-where
-    T: Fn(u32) -> u32,
-{
-    fn new(calculation: T) -> Cacher<T> {
-        Cacher {
-            calculation,
-            value: None,
-        }
-    }
-
-    fn value(&mut self, arg: u32) -> u32 {
-        match self.value {
-            Some(v) => v,
-            None => {
-                let v = (self.calculation)(arg);
-                self.value = Some(v);
-                v
-            }
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    // ANCHOR: here
-    #[test]
-    fn call_with_different_values() {
-        let mut c = Cacher::new(|a| a);
-
-        let v1 = c.value(1);
-        let v2 = c.value(2);
-
-        assert_eq!(v2, 2);
-    }
-    // ANCHOR_END: here
-}
diff --git a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/Cargo.lock b/listings/ch13-functional-features/no-listing-02-functions-cant-capture/Cargo.lock
deleted file mode 100755
index a96532a..0000000
--- a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "equal-to-x"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/Cargo.toml b/listings/ch13-functional-features/no-listing-02-functions-cant-capture/Cargo.toml
deleted file mode 100755
index ca73ff7..0000000
--- a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "equal-to-x"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/output.txt b/listings/ch13-functional-features/no-listing-02-functions-cant-capture/output.txt
deleted file mode 100755
index 3cf9915..0000000
--- a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/output.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-$ cargo run
-   Compiling equal-to-x v0.1.0 (file:///projects/equal-to-x)
-error[E0434]: can't capture dynamic environment in a fn item
- --> src/main.rs:5:14
-  |
-5 |         z == x
-  |              ^
-  |
-  = help: use the `|| { ... }` closure form instead
-
-For more information about this error, try `rustc --explain E0434`.
-error: could not compile `equal-to-x` due to previous error
diff --git a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/src/main.rs b/listings/ch13-functional-features/no-listing-02-functions-cant-capture/src/main.rs
deleted file mode 100755
index 1b5d2b9..0000000
--- a/listings/ch13-functional-features/no-listing-02-functions-cant-capture/src/main.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-fn main() {
-    let x = 4;
-
-    fn equal_to_x(z: i32) -> bool {
-        z == x
-    }
-
-    let y = 4;
-
-    assert!(equal_to_x(y));
-}
diff --git a/listings/ch13-functional-features/no-listing-03-move-closures/Cargo.lock b/listings/ch13-functional-features/no-listing-03-move-closures/Cargo.lock
deleted file mode 100755
index a96532a..0000000
--- a/listings/ch13-functional-features/no-listing-03-move-closures/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "equal-to-x"
-version = "0.1.0"
-
diff --git a/listings/ch13-functional-features/no-listing-03-move-closures/Cargo.toml b/listings/ch13-functional-features/no-listing-03-move-closures/Cargo.toml
deleted file mode 100755
index ca73ff7..0000000
--- a/listings/ch13-functional-features/no-listing-03-move-closures/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "equal-to-x"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch13-functional-features/no-listing-03-move-closures/output.txt b/listings/ch13-functional-features/no-listing-03-move-closures/output.txt
deleted file mode 100755
index ae1aa91..0000000
--- a/listings/ch13-functional-features/no-listing-03-move-closures/output.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-$ cargo run
-   Compiling equal-to-x v0.1.0 (file:///projects/equal-to-x)
-error[E0382]: borrow of moved value: `x`
- --> src/main.rs:6:40
-  |
-2 |     let x = vec![1, 2, 3];
-  |         - move occurs because `x` has type `Vec<i32>`, which does not implement the `Copy` trait
-3 | 
-4 |     let equal_to_x = move |z| z == x;
-  |                      --------      - variable moved due to use in closure
-  |                      |
-  |                      value moved into closure here
-5 | 
-6 |     println!("can't use x here: {:?}", x);
-  |                                        ^ value borrowed here after move
-
-For more information about this error, try `rustc --explain E0382`.
-error: could not compile `equal-to-x` due to previous error
diff --git a/listings/ch13-functional-features/no-listing-03-move-closures/src/main.rs b/listings/ch13-functional-features/no-listing-03-move-closures/src/main.rs
deleted file mode 100755
index 19d4776..0000000
--- a/listings/ch13-functional-features/no-listing-03-move-closures/src/main.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-fn main() {
-    let x = vec![1, 2, 3];
-
-    let equal_to_x = move |z| z == x;
-
-    println!("can't use x here: {:?}", x);
-
-    let y = vec![1, 2, 3];
-
-    assert!(equal_to_x(y));
-}
diff --git a/listings/ch14-more-about-cargo/listing-14-01/Cargo.lock b/listings/ch14-more-about-cargo/listing-14-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/listing-14-01/Cargo.toml b/listings/ch14-more-about-cargo/listing-14-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/listing-14-01/src/lib.rs b/listings/ch14-more-about-cargo/listing-14-01/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/listing-14-02/Cargo.lock b/listings/ch14-more-about-cargo/listing-14-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/listing-14-02/Cargo.toml b/listings/ch14-more-about-cargo/listing-14-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/listing-14-02/src/lib.rs b/listings/ch14-more-about-cargo/listing-14-02/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/listing-14-03/Cargo.lock b/listings/ch14-more-about-cargo/listing-14-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/listing-14-03/Cargo.toml b/listings/ch14-more-about-cargo/listing-14-03/Cargo.toml
old mode 100755
new mode 100644
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diff --git a/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/.gitignore b/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/.gitignore
old mode 100755
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old mode 100755
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diff --git a/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.toml b/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.toml
old mode 100755
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diff --git a/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/rustfmt-ignore b/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/rustfmt-ignore
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diff --git a/listings/ch14-more-about-cargo/output-only-02-add-one/add/.gitignore b/listings/ch14-more-about-cargo/output-only-02-add-one/add/.gitignore
deleted file mode 100755
index fc0f08e..0000000
--- a/listings/ch14-more-about-cargo/output-only-02-add-one/add/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-add_one
diff --git a/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.lock b/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.toml b/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.toml
old mode 100755
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diff --git a/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/src/lib.rs b/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/src/lib.rs
new file mode 100644
index 0000000..7d12d9a
--- /dev/null
+++ b/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}
diff --git a/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/Cargo.toml b/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/Cargo.toml
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diff --git a/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.lock b/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.lock
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diff --git a/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/Cargo.toml b/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/src/main.rs b/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/src/main.rs
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-01/Cargo.lock b/listings/ch15-smart-pointers/listing-15-01/Cargo.lock
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-01/Cargo.toml b/listings/ch15-smart-pointers/listing-15-01/Cargo.toml
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-01/src/main.rs b/listings/ch15-smart-pointers/listing-15-01/src/main.rs
old mode 100755
new mode 100644
index 8da1d90..97f04f3
--- a/listings/ch15-smart-pointers/listing-15-01/src/main.rs
+++ b/listings/ch15-smart-pointers/listing-15-01/src/main.rs
@@ -1,4 +1,4 @@
 fn main() {
     let b = Box::new(5);
-    println!("b = {}", b);
+    println!("b = {b}");
 }
diff --git a/listings/ch15-smart-pointers/listing-15-02/Cargo.lock b/listings/ch15-smart-pointers/listing-15-02/Cargo.lock
old mode 100755
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old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-02/src/main.rs b/listings/ch15-smart-pointers/listing-15-02/src/main.rs
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-03/Cargo.lock b/listings/ch15-smart-pointers/listing-15-03/Cargo.lock
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-03/Cargo.toml b/listings/ch15-smart-pointers/listing-15-03/Cargo.toml
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-03/output.txt b/listings/ch15-smart-pointers/listing-15-03/output.txt
old mode 100755
new mode 100644
index d5522cd..2563fb6
--- a/listings/ch15-smart-pointers/listing-15-03/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-03/output.txt
@@ -4,14 +4,25 @@ error[E0072]: recursive type `List` has infinite size
  --> src/main.rs:1:1
   |
 1 | enum List {
-  | ^^^^^^^^^ recursive type has infinite size
+  | ^^^^^^^^^
 2 |     Cons(i32, List),
   |               ---- recursive without indirection
   |
-help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `List` representable
+help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
   |
 2 |     Cons(i32, Box<List>),
   |               ++++    +
 
-For more information about this error, try `rustc --explain E0072`.
-error: could not compile `cons-list` due to previous error
+error[E0391]: cycle detected when computing when `List` needs drop
+ --> src/main.rs:1:1
+  |
+1 | enum List {
+  | ^^^^^^^^^
+  |
+  = note: ...which immediately requires computing when `List` needs drop again
+  = note: cycle used when computing whether `List` needs drop
+  = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
+
+Some errors have detailed explanations: E0072, E0391.
+For more information about an error, try `rustc --explain E0072`.
+error: could not compile `cons-list` (bin "cons-list") due to 2 previous errors
diff --git a/listings/ch15-smart-pointers/listing-15-03/src/main.rs b/listings/ch15-smart-pointers/listing-15-03/src/main.rs
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old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-08/Cargo.lock b/listings/ch15-smart-pointers/listing-15-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-08/Cargo.toml b/listings/ch15-smart-pointers/listing-15-08/Cargo.toml
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-08/src/main.rs b/listings/ch15-smart-pointers/listing-15-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-09/Cargo.lock b/listings/ch15-smart-pointers/listing-15-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-09/Cargo.toml b/listings/ch15-smart-pointers/listing-15-09/Cargo.toml
old mode 100755
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diff --git a/listings/ch15-smart-pointers/listing-15-09/output.txt b/listings/ch15-smart-pointers/listing-15-09/output.txt
old mode 100755
new mode 100644
index 75e5f1c..a295d26
--- a/listings/ch15-smart-pointers/listing-15-09/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-09/output.txt
@@ -7,4 +7,4 @@ error[E0614]: type `MyBox<{integer}>` cannot be dereferenced
    |                   ^^
 
 For more information about this error, try `rustc --explain E0614`.
-error: could not compile `deref-example` due to previous error
+error: could not compile `deref-example` (bin "deref-example") due to 1 previous error
diff --git a/listings/ch15-smart-pointers/listing-15-09/src/main.rs b/listings/ch15-smart-pointers/listing-15-09/src/main.rs
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old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-14/Cargo.lock b/listings/ch15-smart-pointers/listing-15-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-14/Cargo.toml b/listings/ch15-smart-pointers/listing-15-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-14/output.txt b/listings/ch15-smart-pointers/listing-15-14/output.txt
old mode 100755
new mode 100644
index 4e79594..1393d44
--- a/listings/ch15-smart-pointers/listing-15-14/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-14/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling drop-example v0.1.0 (file:///projects/drop-example)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.60s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.60s
      Running `target/debug/drop-example`
 CustomSmartPointers created.
 Dropping CustomSmartPointer with data `other stuff`!
diff --git a/listings/ch15-smart-pointers/listing-15-14/src/main.rs b/listings/ch15-smart-pointers/listing-15-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-15/Cargo.lock b/listings/ch15-smart-pointers/listing-15-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-15/Cargo.toml b/listings/ch15-smart-pointers/listing-15-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-15/output.txt b/listings/ch15-smart-pointers/listing-15-15/output.txt
old mode 100755
new mode 100644
index a38c9cc..8a53b28
--- a/listings/ch15-smart-pointers/listing-15-15/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-15/output.txt
@@ -4,10 +4,12 @@ error[E0040]: explicit use of destructor method
   --> src/main.rs:16:7
    |
 16 |     c.drop();
-   |     --^^^^--
-   |     | |
-   |     | explicit destructor calls not allowed
-   |     help: consider using `drop` function: `drop(c)`
+   |       ^^^^ explicit destructor calls not allowed
+   |
+help: consider using `drop` function
+   |
+16 |     drop(c);
+   |     +++++ ~
 
 For more information about this error, try `rustc --explain E0040`.
-error: could not compile `drop-example` due to previous error
+error: could not compile `drop-example` (bin "drop-example") due to 1 previous error
diff --git a/listings/ch15-smart-pointers/listing-15-15/src/main.rs b/listings/ch15-smart-pointers/listing-15-15/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-16/Cargo.lock b/listings/ch15-smart-pointers/listing-15-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-16/Cargo.toml b/listings/ch15-smart-pointers/listing-15-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-16/output.txt b/listings/ch15-smart-pointers/listing-15-16/output.txt
old mode 100755
new mode 100644
index e960cd8..f032d84
--- a/listings/ch15-smart-pointers/listing-15-16/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-16/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling drop-example v0.1.0 (file:///projects/drop-example)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.73s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
      Running `target/debug/drop-example`
 CustomSmartPointer created.
 Dropping CustomSmartPointer with data `some data`!
diff --git a/listings/ch15-smart-pointers/listing-15-16/src/main.rs b/listings/ch15-smart-pointers/listing-15-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-17/Cargo.lock b/listings/ch15-smart-pointers/listing-15-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-17/Cargo.toml b/listings/ch15-smart-pointers/listing-15-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-17/output.txt b/listings/ch15-smart-pointers/listing-15-17/output.txt
old mode 100755
new mode 100644
index ab314d8..757a65f
--- a/listings/ch15-smart-pointers/listing-15-17/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-17/output.txt
@@ -11,4 +11,4 @@ error[E0382]: use of moved value: `a`
    |                              ^ value used here after move
 
 For more information about this error, try `rustc --explain E0382`.
-error: could not compile `cons-list` due to previous error
+error: could not compile `cons-list` (bin "cons-list") due to 1 previous error
diff --git a/listings/ch15-smart-pointers/listing-15-17/src/main.rs b/listings/ch15-smart-pointers/listing-15-17/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-18/Cargo.lock b/listings/ch15-smart-pointers/listing-15-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-18/Cargo.toml b/listings/ch15-smart-pointers/listing-15-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-18/src/main.rs b/listings/ch15-smart-pointers/listing-15-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-19/Cargo.lock b/listings/ch15-smart-pointers/listing-15-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-19/Cargo.toml b/listings/ch15-smart-pointers/listing-15-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-19/output.txt b/listings/ch15-smart-pointers/listing-15-19/output.txt
old mode 100755
new mode 100644
index 6a8cc8e..252ccae
--- a/listings/ch15-smart-pointers/listing-15-19/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-19/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling cons-list v0.1.0 (file:///projects/cons-list)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.45s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
      Running `target/debug/cons-list`
 count after creating a = 1
 count after creating b = 2
diff --git a/listings/ch15-smart-pointers/listing-15-19/src/main.rs b/listings/ch15-smart-pointers/listing-15-19/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-20/Cargo.lock b/listings/ch15-smart-pointers/listing-15-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-20/Cargo.toml b/listings/ch15-smart-pointers/listing-15-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-20/src/lib.rs b/listings/ch15-smart-pointers/listing-15-20/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-21/Cargo.lock b/listings/ch15-smart-pointers/listing-15-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-21/Cargo.toml b/listings/ch15-smart-pointers/listing-15-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-21/output.txt b/listings/ch15-smart-pointers/listing-15-21/output.txt
old mode 100755
new mode 100644
index 6b07b66..3f00da3
--- a/listings/ch15-smart-pointers/listing-15-21/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-21/output.txt
@@ -3,12 +3,13 @@ $ cargo test
 error[E0596]: cannot borrow `self.sent_messages` as mutable, as it is behind a `&` reference
   --> src/lib.rs:58:13
    |
-2  |     fn send(&self, msg: &str);
-   |             ----- help: consider changing that to be a mutable reference: `&mut self`
-...
 58 |             self.sent_messages.push(String::from(message));
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+   |             ^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+   |
+help: consider changing this to be a mutable reference
+   |
+2  |     fn send(&mut self, msg: &str);
+   |             ~~~~~~~~~
 
 For more information about this error, try `rustc --explain E0596`.
-error: could not compile `limit-tracker` due to previous error
-warning: build failed, waiting for other jobs to finish...
+error: could not compile `limit-tracker` (lib test) due to 1 previous error
diff --git a/listings/ch15-smart-pointers/listing-15-21/src/lib.rs b/listings/ch15-smart-pointers/listing-15-21/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-22/Cargo.lock b/listings/ch15-smart-pointers/listing-15-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-22/Cargo.toml b/listings/ch15-smart-pointers/listing-15-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-22/src/lib.rs b/listings/ch15-smart-pointers/listing-15-22/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-23/Cargo.lock b/listings/ch15-smart-pointers/listing-15-23/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-23/Cargo.toml b/listings/ch15-smart-pointers/listing-15-23/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-23/output.txt b/listings/ch15-smart-pointers/listing-15-23/output.txt
old mode 100755
new mode 100644
index 3749c84..d3e5602
--- a/listings/ch15-smart-pointers/listing-15-23/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-23/output.txt
@@ -1,6 +1,6 @@
 $ cargo test
    Compiling limit-tracker v0.1.0 (file:///projects/limit-tracker)
-    Finished test [unoptimized + debuginfo] target(s) in 0.91s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.91s
      Running unittests src/lib.rs (target/debug/deps/limit_tracker-e599811fa246dbde)
 
 running 1 test
@@ -9,7 +9,8 @@ test tests::it_sends_an_over_75_percent_warning_message ... FAILED
 failures:
 
 ---- tests::it_sends_an_over_75_percent_warning_message stdout ----
-thread 'main' panicked at 'already borrowed: BorrowMutError', src/lib.rs:60:53
+thread 'tests::it_sends_an_over_75_percent_warning_message' panicked at src/lib.rs:60:53:
+already borrowed: BorrowMutError
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/listings/ch15-smart-pointers/listing-15-23/src/lib.rs b/listings/ch15-smart-pointers/listing-15-23/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-24/Cargo.lock b/listings/ch15-smart-pointers/listing-15-24/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-24/Cargo.toml b/listings/ch15-smart-pointers/listing-15-24/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-24/output.txt b/listings/ch15-smart-pointers/listing-15-24/output.txt
old mode 100755
new mode 100644
index 21b3530..bbdc588
--- a/listings/ch15-smart-pointers/listing-15-24/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-24/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling cons-list v0.1.0 (file:///projects/cons-list)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.63s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.63s
      Running `target/debug/cons-list`
 a after = Cons(RefCell { value: 15 }, Nil)
 b after = Cons(RefCell { value: 3 }, Cons(RefCell { value: 15 }, Nil))
diff --git a/listings/ch15-smart-pointers/listing-15-24/src/main.rs b/listings/ch15-smart-pointers/listing-15-24/src/main.rs
old mode 100755
new mode 100644
index e225bd8..e3dda1a
--- a/listings/ch15-smart-pointers/listing-15-24/src/main.rs
+++ b/listings/ch15-smart-pointers/listing-15-24/src/main.rs
@@ -18,7 +18,7 @@ fn main() {
 
     *value.borrow_mut() += 10;
 
-    println!("a after = {:?}", a);
-    println!("b after = {:?}", b);
-    println!("c after = {:?}", c);
+    println!("a after = {a:?}");
+    println!("b after = {b:?}");
+    println!("c after = {c:?}");
 }
diff --git a/listings/ch15-smart-pointers/listing-15-25/Cargo.lock b/listings/ch15-smart-pointers/listing-15-25/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-25/Cargo.toml b/listings/ch15-smart-pointers/listing-15-25/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-25/src/main.rs b/listings/ch15-smart-pointers/listing-15-25/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-26/Cargo.lock b/listings/ch15-smart-pointers/listing-15-26/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-26/Cargo.toml b/listings/ch15-smart-pointers/listing-15-26/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-26/output.txt b/listings/ch15-smart-pointers/listing-15-26/output.txt
old mode 100755
new mode 100644
index 8b8eb40..b8e70e4
--- a/listings/ch15-smart-pointers/listing-15-26/output.txt
+++ b/listings/ch15-smart-pointers/listing-15-26/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling cons-list v0.1.0 (file:///projects/cons-list)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.53s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.53s
      Running `target/debug/cons-list`
 a initial rc count = 1
 a next item = Some(RefCell { value: Nil })
diff --git a/listings/ch15-smart-pointers/listing-15-26/src/main.rs b/listings/ch15-smart-pointers/listing-15-26/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-27/Cargo.lock b/listings/ch15-smart-pointers/listing-15-27/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-27/Cargo.toml b/listings/ch15-smart-pointers/listing-15-27/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-27/src/main.rs b/listings/ch15-smart-pointers/listing-15-27/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-28/Cargo.lock b/listings/ch15-smart-pointers/listing-15-28/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-28/Cargo.toml b/listings/ch15-smart-pointers/listing-15-28/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-28/src/main.rs b/listings/ch15-smart-pointers/listing-15-28/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-29/Cargo.lock b/listings/ch15-smart-pointers/listing-15-29/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-29/Cargo.toml b/listings/ch15-smart-pointers/listing-15-29/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/listing-15-29/src/main.rs b/listings/ch15-smart-pointers/listing-15-29/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.lock b/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.toml b/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt b/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt
old mode 100755
new mode 100644
index 8e84746..95b9b68
--- a/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt
+++ b/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt
@@ -3,10 +3,13 @@ $ cargo run
 error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
  --> src/main.rs:3:13
   |
-2 |     let x = 5;
-  |         - help: consider changing this to be mutable: `mut x`
 3 |     let y = &mut x;
   |             ^^^^^^ cannot borrow as mutable
+  |
+help: consider changing this to be mutable
+  |
+2 |     let mut x = 5;
+  |         +++
 
 For more information about this error, try `rustc --explain E0596`.
-error: could not compile `borrowing` due to previous error
+error: could not compile `borrowing` (bin "borrowing") due to 1 previous error
diff --git a/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/src/main.rs b/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.lock b/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.toml b/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt b/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt
old mode 100755
new mode 100644
index a03cc34..d1eccd2
--- a/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt
+++ b/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt
@@ -7,17 +7,7 @@ error[E0277]: can't compare `{integer}` with `&{integer}`
   |     ^^^^^^^^^^^^^^^^ no implementation for `{integer} == &{integer}`
   |
   = help: the trait `PartialEq<&{integer}>` is not implemented for `{integer}`
-  = help: the following other types implement trait `PartialEq<Rhs>`:
-            f32
-            f64
-            i128
-            i16
-            i32
-            i64
-            i8
-            isize
-          and 6 others
   = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `deref-example` due to previous error
+error: could not compile `deref-example` (bin "deref-example") due to 1 previous error
diff --git a/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/src/main.rs b/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-01/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-01/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-01/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-01/src/main.rs
old mode 100755
new mode 100644
index 6305a98..ea10ba2
--- a/listings/ch16-fearless-concurrency/listing-16-01/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-01/src/main.rs
@@ -4,13 +4,13 @@ use std::time::Duration;
 fn main() {
     thread::spawn(|| {
         for i in 1..10 {
-            println!("hi number {} from the spawned thread!", i);
+            println!("hi number {i} from the spawned thread!");
             thread::sleep(Duration::from_millis(1));
         }
     });
 
     for i in 1..5 {
-        println!("hi number {} from the main thread!", i);
+        println!("hi number {i} from the main thread!");
         thread::sleep(Duration::from_millis(1));
     }
 }
diff --git a/listings/ch16-fearless-concurrency/listing-16-02/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-02/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-02/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-02/src/main.rs
old mode 100755
new mode 100644
index e37607f..33bf53f
--- a/listings/ch16-fearless-concurrency/listing-16-02/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-02/src/main.rs
@@ -4,13 +4,13 @@ use std::time::Duration;
 fn main() {
     let handle = thread::spawn(|| {
         for i in 1..10 {
-            println!("hi number {} from the spawned thread!", i);
+            println!("hi number {i} from the spawned thread!");
             thread::sleep(Duration::from_millis(1));
         }
     });
 
     for i in 1..5 {
-        println!("hi number {} from the main thread!", i);
+        println!("hi number {i} from the main thread!");
         thread::sleep(Duration::from_millis(1));
     }
 
diff --git a/listings/ch16-fearless-concurrency/listing-16-03/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-03/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-03/output.txt b/listings/ch16-fearless-concurrency/listing-16-03/output.txt
old mode 100755
new mode 100644
index 321bf59..3de4d4d
--- a/listings/ch16-fearless-concurrency/listing-16-03/output.txt
+++ b/listings/ch16-fearless-concurrency/listing-16-03/output.txt
@@ -5,15 +5,15 @@ error[E0373]: closure may outlive the current function, but it borrows `v`, whic
   |
 6 |     let handle = thread::spawn(|| {
   |                                ^^ may outlive borrowed value `v`
-7 |         println!("Here's a vector: {:?}", v);
-  |                                           - `v` is borrowed here
+7 |         println!("Here's a vector: {v:?}");
+  |                                     - `v` is borrowed here
   |
 note: function requires argument type to outlive `'static`
  --> src/main.rs:6:18
   |
 6 |       let handle = thread::spawn(|| {
   |  __________________^
-7 | |         println!("Here's a vector: {:?}", v);
+7 | |         println!("Here's a vector: {v:?}");
 8 | |     });
   | |______^
 help: to force the closure to take ownership of `v` (and any other referenced variables), use the `move` keyword
@@ -22,4 +22,4 @@ help: to force the closure to take ownership of `v` (and any other referenced va
   |                                ++++
 
 For more information about this error, try `rustc --explain E0373`.
-error: could not compile `threads` due to previous error
+error: could not compile `threads` (bin "threads") due to 1 previous error
diff --git a/listings/ch16-fearless-concurrency/listing-16-03/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-03/src/main.rs
old mode 100755
new mode 100644
index defc876..b2231c5
--- a/listings/ch16-fearless-concurrency/listing-16-03/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-03/src/main.rs
@@ -4,7 +4,7 @@ fn main() {
     let v = vec![1, 2, 3];
 
     let handle = thread::spawn(|| {
-        println!("Here's a vector: {:?}", v);
+        println!("Here's a vector: {v:?}");
     });
 
     handle.join().unwrap();
diff --git a/listings/ch16-fearless-concurrency/listing-16-04/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-04/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-04/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-04/src/main.rs
old mode 100755
new mode 100644
index 0bccc5f..f0a9058
--- a/listings/ch16-fearless-concurrency/listing-16-04/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-04/src/main.rs
@@ -4,7 +4,7 @@ fn main() {
     let v = vec![1, 2, 3];
 
     let handle = thread::spawn(|| {
-        println!("Here's a vector: {:?}", v);
+        println!("Here's a vector: {v:?}");
     });
 
     drop(v); // oh no!
diff --git a/listings/ch16-fearless-concurrency/listing-16-05/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-05/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-05/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-05/src/main.rs
old mode 100755
new mode 100644
index a6547dc..76783e6
--- a/listings/ch16-fearless-concurrency/listing-16-05/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-05/src/main.rs
@@ -4,7 +4,7 @@ fn main() {
     let v = vec![1, 2, 3];
 
     let handle = thread::spawn(move || {
-        println!("Here's a vector: {:?}", v);
+        println!("Here's a vector: {v:?}");
     });
 
     handle.join().unwrap();
diff --git a/listings/ch16-fearless-concurrency/listing-16-06/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-06/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-06/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-07/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-07/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-07/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-08/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-08/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-08/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-08/src/main.rs
old mode 100755
new mode 100644
index fbba916..e7ac452
--- a/listings/ch16-fearless-concurrency/listing-16-08/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-08/src/main.rs
@@ -10,5 +10,5 @@ fn main() {
     });
 
     let received = rx.recv().unwrap();
-    println!("Got: {}", received);
+    println!("Got: {received}");
 }
diff --git a/listings/ch16-fearless-concurrency/listing-16-09/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-09/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-09/output.txt b/listings/ch16-fearless-concurrency/listing-16-09/output.txt
old mode 100755
new mode 100644
index db85185..ed4797f
--- a/listings/ch16-fearless-concurrency/listing-16-09/output.txt
+++ b/listings/ch16-fearless-concurrency/listing-16-09/output.txt
@@ -1,16 +1,20 @@
 $ cargo run
    Compiling message-passing v0.1.0 (file:///projects/message-passing)
 error[E0382]: borrow of moved value: `val`
-  --> src/main.rs:10:31
+  --> src/main.rs:10:26
    |
 8  |         let val = String::from("hi");
    |             --- move occurs because `val` has type `String`, which does not implement the `Copy` trait
 9  |         tx.send(val).unwrap();
    |                 --- value moved here
-10 |         println!("val is {}", val);
-   |                               ^^^ value borrowed here after move
+10 |         println!("val is {val}");
+   |                          ^^^^^ value borrowed here after move
    |
    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider cloning the value if the performance cost is acceptable
+   |
+9  |         tx.send(val.clone()).unwrap();
+   |                    ++++++++
 
 For more information about this error, try `rustc --explain E0382`.
-error: could not compile `message-passing` due to previous error
+error: could not compile `message-passing` (bin "message-passing") due to 1 previous error
diff --git a/listings/ch16-fearless-concurrency/listing-16-09/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-09/src/main.rs
old mode 100755
new mode 100644
index 98a8129..fe20d34
--- a/listings/ch16-fearless-concurrency/listing-16-09/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-09/src/main.rs
@@ -7,9 +7,9 @@ fn main() {
     thread::spawn(move || {
         let val = String::from("hi");
         tx.send(val).unwrap();
-        println!("val is {}", val);
+        println!("val is {val}");
     });
 
     let received = rx.recv().unwrap();
-    println!("Got: {}", received);
+    println!("Got: {received}");
 }
diff --git a/listings/ch16-fearless-concurrency/listing-16-10/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-10/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-10/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-10/src/main.rs
old mode 100755
new mode 100644
index 82b220d..c9702bd
--- a/listings/ch16-fearless-concurrency/listing-16-10/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-10/src/main.rs
@@ -20,6 +20,6 @@ fn main() {
     });
 
     for received in rx {
-        println!("Got: {}", received);
+        println!("Got: {received}");
     }
 }
diff --git a/listings/ch16-fearless-concurrency/listing-16-11/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-11/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-11/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-11/src/main.rs
old mode 100755
new mode 100644
index d92deab..174a5d1
--- a/listings/ch16-fearless-concurrency/listing-16-11/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-11/src/main.rs
@@ -38,7 +38,7 @@ fn main() {
     });
 
     for received in rx {
-        println!("Got: {}", received);
+        println!("Got: {received}");
     }
 
     // --snip--
diff --git a/listings/ch16-fearless-concurrency/listing-16-12/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-12/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-12/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-12/src/main.rs
old mode 100755
new mode 100644
index 0c0d676..99ba5b4
--- a/listings/ch16-fearless-concurrency/listing-16-12/src/main.rs
+++ b/listings/ch16-fearless-concurrency/listing-16-12/src/main.rs
@@ -8,5 +8,5 @@ fn main() {
         *num = 6;
     }
 
-    println!("m = {:?}", m);
+    println!("m = {m:?}");
 }
diff --git a/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-13/output.txt b/listings/ch16-fearless-concurrency/listing-16-13/output.txt
old mode 100755
new mode 100644
index ea69639..5405f76
--- a/listings/ch16-fearless-concurrency/listing-16-13/output.txt
+++ b/listings/ch16-fearless-concurrency/listing-16-13/output.txt
@@ -1,15 +1,16 @@
 $ cargo run
    Compiling shared-state v0.1.0 (file:///projects/shared-state)
-error[E0382]: use of moved value: `counter`
-  --> src/main.rs:9:36
+error[E0382]: borrow of moved value: `counter`
+  --> src/main.rs:21:29
    |
 5  |     let counter = Mutex::new(0);
    |         ------- move occurs because `counter` has type `Mutex<i32>`, which does not implement the `Copy` trait
 ...
 9  |         let handle = thread::spawn(move || {
-   |                                    ^^^^^^^ value moved into closure here, in previous iteration of loop
-10 |             let mut num = counter.lock().unwrap();
-   |                           ------- use occurs due to use in closure
+   |                                    ------- value moved into closure here, in previous iteration of loop
+...
+21 |     println!("Result: {}", *counter.lock().unwrap());
+   |                             ^^^^^^^ value borrowed here after move
 
 For more information about this error, try `rustc --explain E0382`.
-error: could not compile `shared-state` due to previous error
+error: could not compile `shared-state` (bin "shared-state") due to 1 previous error
diff --git a/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-14/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-14/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-14/output.txt b/listings/ch16-fearless-concurrency/listing-16-14/output.txt
old mode 100755
new mode 100644
index 0634b86..011e662
--- a/listings/ch16-fearless-concurrency/listing-16-14/output.txt
+++ b/listings/ch16-fearless-concurrency/listing-16-14/output.txt
@@ -6,7 +6,7 @@ error[E0277]: `Rc<Mutex<i32>>` cannot be sent between threads safely
 11 |           let handle = thread::spawn(move || {
    |                        ------------- ^------
    |                        |             |
-   |  ______________________|_____________within this `[closure@src/main.rs:11:36: 11:43]`
+   |  ______________________|_____________within this `{closure@src/main.rs:11:36: 11:43}`
    | |                      |
    | |                      required by a bound introduced by this call
 12 | |             let mut num = counter.lock().unwrap();
@@ -15,13 +15,14 @@ error[E0277]: `Rc<Mutex<i32>>` cannot be sent between threads safely
 15 | |         });
    | |_________^ `Rc<Mutex<i32>>` cannot be sent between threads safely
    |
-   = help: within `[closure@src/main.rs:11:36: 11:43]`, the trait `Send` is not implemented for `Rc<Mutex<i32>>`
+   = help: within `{closure@src/main.rs:11:36: 11:43}`, the trait `Send` is not implemented for `Rc<Mutex<i32>>`, which is required by `{closure@src/main.rs:11:36: 11:43}: Send`
 note: required because it's used within this closure
   --> src/main.rs:11:36
    |
 11 |         let handle = thread::spawn(move || {
    |                                    ^^^^^^^
 note: required by a bound in `spawn`
+  --> /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library/std/src/thread/mod.rs:677:1
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `shared-state` due to previous error
+error: could not compile `shared-state` (bin "shared-state") due to 1 previous error
diff --git a/listings/ch16-fearless-concurrency/listing-16-14/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-15/Cargo.lock b/listings/ch16-fearless-concurrency/listing-16-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-15/Cargo.toml b/listings/ch16-fearless-concurrency/listing-16-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/listing-16-15/src/main.rs b/listings/ch16-fearless-concurrency/listing-16-15/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.lock b/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.toml b/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/src/main.rs b/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/src/main.rs
old mode 100755
new mode 100644
index 6205e57..7023a90
--- a/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/src/main.rs
+++ b/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/src/main.rs
@@ -4,7 +4,7 @@ use std::time::Duration;
 fn main() {
     let handle = thread::spawn(|| {
         for i in 1..10 {
-            println!("hi number {} from the spawned thread!", i);
+            println!("hi number {i} from the spawned thread!");
             thread::sleep(Duration::from_millis(1));
         }
     });
@@ -12,7 +12,7 @@ fn main() {
     handle.join().unwrap();
 
     for i in 1..5 {
-        println!("hi number {} from the main thread!", i);
+        println!("hi number {i} from the main thread!");
         thread::sleep(Duration::from_millis(1));
     }
 }
diff --git a/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.lock b/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.toml b/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/src/main.rs b/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.lock b/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.toml b/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch16-fearless-concurrency/output-only-01-move-drop/output.txt b/listings/ch16-fearless-concurrency/output-only-01-move-drop/output.txt
old mode 100755
new mode 100644
index 301a9a4..929354c
--- a/listings/ch16-fearless-concurrency/output-only-01-move-drop/output.txt
+++ b/listings/ch16-fearless-concurrency/output-only-01-move-drop/output.txt
@@ -8,11 +8,11 @@ error[E0382]: use of moved value: `v`
 5  |
 6  |     let handle = thread::spawn(move || {
    |                                ------- value moved into closure here
-7  |         println!("Here's a vector: {:?}", v);
-   |                                           - variable moved due to use in closure
+7  |         println!("Here's a vector: {v:?}");
+   |                                     - variable moved due to use in closure
 ...
 10 |     drop(v); // oh no!
    |          ^ value used here after move
 
 For more information about this error, try `rustc --explain E0382`.
-error: could not compile `threads` due to previous error
+error: could not compile `threads` (bin "threads") due to 1 previous error
diff --git a/listings/ch16-fearless-concurrency/output-only-01-move-drop/src/main.rs b/listings/ch16-fearless-concurrency/output-only-01-move-drop/src/main.rs
old mode 100755
new mode 100644
index 70f659c..cc71cba
--- a/listings/ch16-fearless-concurrency/output-only-01-move-drop/src/main.rs
+++ b/listings/ch16-fearless-concurrency/output-only-01-move-drop/src/main.rs
@@ -4,7 +4,7 @@ fn main() {
     let v = vec![1, 2, 3];
 
     let handle = thread::spawn(move || {
-        println!("Here's a vector: {:?}", v);
+        println!("Here's a vector: {v:?}");
     });
 
     drop(v); // oh no!
diff --git a/listings/ch17-oop/listing-17-01/Cargo.lock b/listings/ch17-oop/listing-17-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-01/Cargo.toml b/listings/ch17-oop/listing-17-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-01/src/lib.rs b/listings/ch17-oop/listing-17-01/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-02/Cargo.lock b/listings/ch17-oop/listing-17-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-02/Cargo.toml b/listings/ch17-oop/listing-17-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-02/src/lib.rs b/listings/ch17-oop/listing-17-02/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-03/Cargo.lock b/listings/ch17-oop/listing-17-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-03/Cargo.toml b/listings/ch17-oop/listing-17-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-03/src/lib.rs b/listings/ch17-oop/listing-17-03/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-04/Cargo.lock b/listings/ch17-oop/listing-17-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-04/Cargo.toml b/listings/ch17-oop/listing-17-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-04/src/lib.rs b/listings/ch17-oop/listing-17-04/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-05/Cargo.lock b/listings/ch17-oop/listing-17-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-05/Cargo.toml b/listings/ch17-oop/listing-17-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-05/src/lib.rs b/listings/ch17-oop/listing-17-05/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-06/Cargo.lock b/listings/ch17-oop/listing-17-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-06/Cargo.toml b/listings/ch17-oop/listing-17-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-06/src/lib.rs b/listings/ch17-oop/listing-17-06/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-07/Cargo.lock b/listings/ch17-oop/listing-17-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-07/Cargo.toml b/listings/ch17-oop/listing-17-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-07/src/lib.rs b/listings/ch17-oop/listing-17-07/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-08/Cargo.lock b/listings/ch17-oop/listing-17-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-08/Cargo.toml b/listings/ch17-oop/listing-17-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-08/src/lib.rs b/listings/ch17-oop/listing-17-08/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-08/src/main.rs b/listings/ch17-oop/listing-17-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-09/Cargo.lock b/listings/ch17-oop/listing-17-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-09/Cargo.toml b/listings/ch17-oop/listing-17-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-09/src/lib.rs b/listings/ch17-oop/listing-17-09/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-09/src/main.rs b/listings/ch17-oop/listing-17-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-10/Cargo.lock b/listings/ch17-oop/listing-17-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-10/Cargo.toml b/listings/ch17-oop/listing-17-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-10/output.txt b/listings/ch17-oop/listing-17-10/output.txt
old mode 100755
new mode 100644
index e0a455f..78d7c39
--- a/listings/ch17-oop/listing-17-10/output.txt
+++ b/listings/ch17-oop/listing-17-10/output.txt
@@ -7,7 +7,7 @@ error[E0277]: the trait bound `String: Draw` is not satisfied
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Draw` is not implemented for `String`
   |
   = help: the trait `Draw` is implemented for `Button`
-  = note: required for the cast from `String` to the object type `dyn Draw`
+  = note: required for the cast from `Box<String>` to `Box<dyn Draw>`
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `gui` due to previous error
+error: could not compile `gui` (bin "gui") due to 1 previous error
diff --git a/listings/ch17-oop/listing-17-10/src/lib.rs b/listings/ch17-oop/listing-17-10/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-10/src/main.rs b/listings/ch17-oop/listing-17-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-11/Cargo.lock b/listings/ch17-oop/listing-17-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-11/Cargo.toml b/listings/ch17-oop/listing-17-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-11/src/main.rs b/listings/ch17-oop/listing-17-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-12/Cargo.lock b/listings/ch17-oop/listing-17-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-12/Cargo.toml b/listings/ch17-oop/listing-17-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-12/src/lib.rs b/listings/ch17-oop/listing-17-12/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-12/src/main.rs b/listings/ch17-oop/listing-17-12/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-13/Cargo.lock b/listings/ch17-oop/listing-17-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-13/Cargo.toml b/listings/ch17-oop/listing-17-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-13/src/lib.rs b/listings/ch17-oop/listing-17-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-13/src/main.rs b/listings/ch17-oop/listing-17-13/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-14/Cargo.lock b/listings/ch17-oop/listing-17-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-14/Cargo.toml b/listings/ch17-oop/listing-17-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-14/src/lib.rs b/listings/ch17-oop/listing-17-14/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-14/src/main.rs b/listings/ch17-oop/listing-17-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-15/Cargo.lock b/listings/ch17-oop/listing-17-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-15/Cargo.toml b/listings/ch17-oop/listing-17-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-15/src/lib.rs b/listings/ch17-oop/listing-17-15/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-15/src/main.rs b/listings/ch17-oop/listing-17-15/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-16/Cargo.lock b/listings/ch17-oop/listing-17-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-16/Cargo.toml b/listings/ch17-oop/listing-17-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-16/src/lib.rs b/listings/ch17-oop/listing-17-16/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-16/src/main.rs b/listings/ch17-oop/listing-17-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-17/Cargo.lock b/listings/ch17-oop/listing-17-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-17/Cargo.toml b/listings/ch17-oop/listing-17-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-17/src/lib.rs b/listings/ch17-oop/listing-17-17/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-17/src/main.rs b/listings/ch17-oop/listing-17-17/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-18/Cargo.lock b/listings/ch17-oop/listing-17-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-18/Cargo.toml b/listings/ch17-oop/listing-17-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-18/src/lib.rs b/listings/ch17-oop/listing-17-18/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-18/src/main.rs b/listings/ch17-oop/listing-17-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-19/Cargo.lock b/listings/ch17-oop/listing-17-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-19/Cargo.toml b/listings/ch17-oop/listing-17-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-19/src/lib.rs b/listings/ch17-oop/listing-17-19/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-20/Cargo.lock b/listings/ch17-oop/listing-17-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-20/Cargo.toml b/listings/ch17-oop/listing-17-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-20/src/lib.rs b/listings/ch17-oop/listing-17-20/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-21/Cargo.lock b/listings/ch17-oop/listing-17-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-21/Cargo.toml b/listings/ch17-oop/listing-17-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-21/src/lib.rs b/listings/ch17-oop/listing-17-21/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch17-oop/listing-17-21/src/main.rs b/listings/ch17-oop/listing-17-21/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-01/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-01/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-01/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-02/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-02/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-02/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-02/src/main.rs
old mode 100755
new mode 100644
index 5f75a4f..2479d84
--- a/listings/ch18-patterns-and-matching/listing-18-02/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-02/src/main.rs
@@ -7,7 +7,7 @@ fn main() {
     stack.push(3);
 
     while let Some(top) = stack.pop() {
-        println!("{}", top);
+        println!("{top}");
     }
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-03/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-03/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-03/output.txt b/listings/ch18-patterns-and-matching/listing-18-03/output.txt
old mode 100755
new mode 100644
index 02fdecb..9add287
--- a/listings/ch18-patterns-and-matching/listing-18-03/output.txt
+++ b/listings/ch18-patterns-and-matching/listing-18-03/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling patterns v0.1.0 (file:///projects/patterns)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.52s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.52s
      Running `target/debug/patterns`
 a is at index 0
 b is at index 1
diff --git a/listings/ch18-patterns-and-matching/listing-18-03/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-03/src/main.rs
old mode 100755
new mode 100644
index eb922d6..218c180
--- a/listings/ch18-patterns-and-matching/listing-18-03/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-03/src/main.rs
@@ -3,7 +3,7 @@ fn main() {
     let v = vec!['a', 'b', 'c'];
 
     for (index, value) in v.iter().enumerate() {
-        println!("{} is at index {}", value, index);
+        println!("{value} is at index {index}");
     }
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-04/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-04/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-04/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-04/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-05/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-05/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-05/output.txt b/listings/ch18-patterns-and-matching/listing-18-05/output.txt
old mode 100755
new mode 100644
index 57916a1..8002272
--- a/listings/ch18-patterns-and-matching/listing-18-05/output.txt
+++ b/listings/ch18-patterns-and-matching/listing-18-05/output.txt
@@ -12,4 +12,4 @@ error[E0308]: mismatched types
              found tuple `(_, _)`
 
 For more information about this error, try `rustc --explain E0308`.
-error: could not compile `patterns` due to previous error
+error: could not compile `patterns` (bin "patterns") due to 1 previous error
diff --git a/listings/ch18-patterns-and-matching/listing-18-05/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-06/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-06/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-06/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-07/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-07/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-07/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-07/src/main.rs
old mode 100755
new mode 100644
index 4eccb80..7006942
--- a/listings/ch18-patterns-and-matching/listing-18-07/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-07/src/main.rs
@@ -1,5 +1,5 @@
 fn print_coordinates(&(x, y): &(i32, i32)) {
-    println!("Current location: ({}, {})", x, y);
+    println!("Current location: ({x}, {y})");
 }
 
 fn main() {
diff --git a/listings/ch18-patterns-and-matching/listing-18-08/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-08/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-08/output.txt b/listings/ch18-patterns-and-matching/listing-18-08/output.txt
old mode 100755
new mode 100644
index 0fd5373..6ce3dfc
--- a/listings/ch18-patterns-and-matching/listing-18-08/output.txt
+++ b/listings/ch18-patterns-and-matching/listing-18-08/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling patterns v0.1.0 (file:///projects/patterns)
-error[E0005]: refutable pattern in local binding: `None` not covered
+error[E0005]: refutable pattern in local binding
  --> src/main.rs:3:9
   |
 3 |     let Some(x) = some_option_value;
@@ -8,12 +8,11 @@ error[E0005]: refutable pattern in local binding: `None` not covered
   |
   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
-note: `Option<i32>` defined here
   = note: the matched value is of type `Option<i32>`
-help: you might want to use `if let` to ignore the variant that isn't matched
+help: you might want to use `let else` to handle the variant that isn't matched
   |
-3 |     let x = if let Some(x) = some_option_value { x } else { todo!() };
-  |     ++++++++++                                 ++++++++++++++++++++++
+3 |     let Some(x) = some_option_value else { todo!() };
+  |                                     ++++++++++++++++
 
 For more information about this error, try `rustc --explain E0005`.
-error: could not compile `patterns` due to previous error
+error: could not compile `patterns` (bin "patterns") due to 1 previous error
diff --git a/listings/ch18-patterns-and-matching/listing-18-08/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-09/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-09/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-09/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-09/src/main.rs
old mode 100755
new mode 100644
index d6274fc..e378c37
--- a/listings/ch18-patterns-and-matching/listing-18-09/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-09/src/main.rs
@@ -2,7 +2,7 @@ fn main() {
     let some_option_value: Option<i32> = None;
     // ANCHOR: here
     if let Some(x) = some_option_value {
-        println!("{}", x);
+        println!("{x}");
     }
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-10/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-10/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-10/output.txt b/listings/ch18-patterns-and-matching/listing-18-10/output.txt
old mode 100755
new mode 100644
index 702d10a..97bc014
--- a/listings/ch18-patterns-and-matching/listing-18-10/output.txt
+++ b/listings/ch18-patterns-and-matching/listing-18-10/output.txt
@@ -6,11 +6,11 @@ warning: irrefutable `if let` pattern
 2 |     if let x = 5 {
   |        ^^^^^^^^^
   |
-  = note: `#[warn(irrefutable_let_patterns)]` on by default
   = note: this pattern will always match, so the `if let` is useless
   = help: consider replacing the `if let` with a `let`
+  = note: `#[warn(irrefutable_let_patterns)]` on by default
 
 warning: `patterns` (bin "patterns") generated 1 warning
-    Finished dev [unoptimized + debuginfo] target(s) in 0.39s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
      Running `target/debug/patterns`
 5
diff --git a/listings/ch18-patterns-and-matching/listing-18-10/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-10/src/main.rs
old mode 100755
new mode 100644
index cb81772..2073948
--- a/listings/ch18-patterns-and-matching/listing-18-10/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-10/src/main.rs
@@ -1,7 +1,7 @@
 fn main() {
     // ANCHOR: here
     if let x = 5 {
-        println!("{}", x);
+        println!("{x}");
     };
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-11/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-11/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-11/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-11/src/main.rs
old mode 100755
new mode 100644
index db942b7..0552128
--- a/listings/ch18-patterns-and-matching/listing-18-11/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-11/src/main.rs
@@ -6,9 +6,9 @@ fn main() {
     match x {
         Some(50) => println!("Got 50"),
         Some(y) => println!("Matched, y = {y}"),
-        _ => println!("Default case, x = {:?}", x),
+        _ => println!("Default case, x = {x:?}"),
     }
 
-    println!("at the end: x = {:?}, y = {y}", x);
+    println!("at the end: x = {x:?}, y = {y}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-12/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-12/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-12/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-12/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-13/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-13/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-13/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-13/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-14/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-14/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-14/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-15/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-15/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-15/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-15/src/main.rs
old mode 100755
new mode 100644
index a3138b2..9407cc1
--- a/listings/ch18-patterns-and-matching/listing-18-15/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-15/src/main.rs
@@ -19,7 +19,7 @@ fn main() {
             println!("Text message: {text}");
         }
         Message::ChangeColor(r, g, b) => {
-            println!("Change the color to red {r}, green {g}, and blue {b}",)
+            println!("Change the color to red {r}, green {g}, and blue {b}")
         }
     }
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-16/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-16/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-16/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-17/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-17/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-17/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-17/src/main.rs
old mode 100755
new mode 100644
index cf1fbe0..7053860
--- a/listings/ch18-patterns-and-matching/listing-18-17/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-17/src/main.rs
@@ -1,5 +1,5 @@
 fn foo(_: i32, y: i32) {
-    println!("This code only uses the y parameter: {}", y);
+    println!("This code only uses the y parameter: {y}");
 }
 
 fn main() {
diff --git a/listings/ch18-patterns-and-matching/listing-18-18/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-18/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-18/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-18/src/main.rs
old mode 100755
new mode 100644
index b776c64..2b88776
--- a/listings/ch18-patterns-and-matching/listing-18-18/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-18/src/main.rs
@@ -12,6 +12,6 @@ fn main() {
         }
     }
 
-    println!("setting is {:?}", setting_value);
+    println!("setting is {setting_value:?}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-19/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-19/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-19/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-19/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-20/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-20/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-20/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-20/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-21/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-21/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-21/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-21/src/main.rs
old mode 100755
new mode 100644
index 9806105..320db62
--- a/listings/ch18-patterns-and-matching/listing-18-21/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-21/src/main.rs
@@ -6,6 +6,6 @@ fn main() {
         println!("found a string");
     }
 
-    println!("{:?}", s);
+    println!("{s:?}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-22/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-22/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-22/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-22/src/main.rs
old mode 100755
new mode 100644
index e2faa34..9df1492
--- a/listings/ch18-patterns-and-matching/listing-18-22/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-22/src/main.rs
@@ -6,6 +6,6 @@ fn main() {
         println!("found a string");
     }
 
-    println!("{:?}", s);
+    println!("{s:?}");
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-23/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-23/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-23/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-23/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-23/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-23/src/main.rs
old mode 100755
new mode 100644
index 7a9d9bb..491d6c5
--- a/listings/ch18-patterns-and-matching/listing-18-23/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-23/src/main.rs
@@ -9,7 +9,7 @@ fn main() {
     let origin = Point { x: 0, y: 0, z: 0 };
 
     match origin {
-        Point { x, .. } => println!("x is {}", x),
+        Point { x, .. } => println!("x is {x}"),
     }
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-24/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-24/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-24/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-24/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-24/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-24/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-25/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-25/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-25/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-25/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-25/output.txt b/listings/ch18-patterns-and-matching/listing-18-25/output.txt
old mode 100755
new mode 100644
index 7e0357e..bd5e0f9
--- a/listings/ch18-patterns-and-matching/listing-18-25/output.txt
+++ b/listings/ch18-patterns-and-matching/listing-18-25/output.txt
@@ -8,4 +8,4 @@ error: `..` can only be used once per tuple pattern
   |          |
   |          previously used here
 
-error: could not compile `patterns` due to previous error
+error: could not compile `patterns` (bin "patterns") due to 1 previous error
diff --git a/listings/ch18-patterns-and-matching/listing-18-25/rustfmt-ignore b/listings/ch18-patterns-and-matching/listing-18-25/rustfmt-ignore
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-25/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-25/src/main.rs
old mode 100755
new mode 100644
index b90884e..6c3b24b
--- a/listings/ch18-patterns-and-matching/listing-18-25/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-25/src/main.rs
@@ -3,7 +3,7 @@ fn main() {
 
     match numbers {
         (.., second, ..) => {
-            println!("Some numbers: {}", second)
+            println!("Some numbers: {second}")
         },
     }
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-26/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-26/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-26/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-26/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-26/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-26/src/main.rs
old mode 100755
new mode 100644
index 41fce97..2566169
--- a/listings/ch18-patterns-and-matching/listing-18-26/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-26/src/main.rs
@@ -3,8 +3,8 @@ fn main() {
     let num = Some(4);
 
     match num {
-        Some(x) if x % 2 == 0 => println!("The number {} is even", x),
-        Some(x) => println!("The number {} is odd", x),
+        Some(x) if x % 2 == 0 => println!("The number {x} is even"),
+        Some(x) => println!("The number {x} is odd"),
         None => (),
     }
     // ANCHOR_END: here
diff --git a/listings/ch18-patterns-and-matching/listing-18-27/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-27/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-27/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-27/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-27/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-27/src/main.rs
old mode 100755
new mode 100644
index 8386a0a..06fd949
--- a/listings/ch18-patterns-and-matching/listing-18-27/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-27/src/main.rs
@@ -5,8 +5,8 @@ fn main() {
     match x {
         Some(50) => println!("Got 50"),
         Some(n) if n == y => println!("Matched, n = {n}"),
-        _ => println!("Default case, x = {:?}", x),
+        _ => println!("Default case, x = {x:?}"),
     }
 
-    println!("at the end: x = {:?}, y = {y}", x);
+    println!("at the end: x = {x:?}, y = {y}");
 }
diff --git a/listings/ch18-patterns-and-matching/listing-18-28/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-28/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-28/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-28/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-28/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-28/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-29/Cargo.lock b/listings/ch18-patterns-and-matching/listing-18-29/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-29/Cargo.toml b/listings/ch18-patterns-and-matching/listing-18-29/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/listing-18-29/src/main.rs b/listings/ch18-patterns-and-matching/listing-18-29/src/main.rs
old mode 100755
new mode 100644
index 3514deb..e36fda8
--- a/listings/ch18-patterns-and-matching/listing-18-29/src/main.rs
+++ b/listings/ch18-patterns-and-matching/listing-18-29/src/main.rs
@@ -9,11 +9,11 @@ fn main() {
     match msg {
         Message::Hello {
             id: id_variable @ 3..=7,
-        } => println!("Found an id in range: {}", id_variable),
+        } => println!("Found an id in range: {id_variable}"),
         Message::Hello { id: 10..=12 } => {
             println!("Found an id in another range")
         }
-        Message::Hello { id } => println!("Found some other id: {}", id),
+        Message::Hello { id } => println!("Found some other id: {id}"),
     }
     // ANCHOR_END: here
 }
diff --git a/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.lock b/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.toml b/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-01-literals/src/main.rs b/listings/ch18-patterns-and-matching/no-listing-01-literals/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.lock b/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.toml b/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/src/main.rs b/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.lock b/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.toml b/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-03-ranges/src/main.rs b/listings/ch18-patterns-and-matching/no-listing-03-ranges/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.lock b/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.toml b/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/src/main.rs b/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.lock b/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.toml b/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/src/main.rs b/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-13-21-reproduced/Cargo.lock b/listings/ch19-advanced-features/listing-13-21-reproduced/Cargo.lock
deleted file mode 100755
index 58b70c5..0000000
--- a/listings/ch19-advanced-features/listing-13-21-reproduced/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "counter"
-version = "0.1.0"
-
diff --git a/listings/ch19-advanced-features/listing-13-21-reproduced/Cargo.toml b/listings/ch19-advanced-features/listing-13-21-reproduced/Cargo.toml
deleted file mode 100755
index 9e103f3..0000000
--- a/listings/ch19-advanced-features/listing-13-21-reproduced/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "counter"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch19-advanced-features/listing-13-21-reproduced/src/lib.rs b/listings/ch19-advanced-features/listing-13-21-reproduced/src/lib.rs
deleted file mode 100755
index 04c7f38..0000000
--- a/listings/ch19-advanced-features/listing-13-21-reproduced/src/lib.rs
+++ /dev/null
@@ -1,25 +0,0 @@
-struct Counter {
-    count: u32,
-}
-
-impl Counter {
-    fn new() -> Counter {
-        Counter { count: 0 }
-    }
-}
-
-// ANCHOR: ch19
-impl Iterator for Counter {
-    type Item = u32;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        // --snip--
-        // ANCHOR_END: ch19
-        if self.count < 5 {
-            self.count += 1;
-            Some(self.count)
-        } else {
-            None
-        }
-    }
-}
diff --git a/listings/ch19-advanced-features/listing-19-01/Cargo.lock b/listings/ch19-advanced-features/listing-19-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-01/Cargo.toml b/listings/ch19-advanced-features/listing-19-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-01/src/main.rs b/listings/ch19-advanced-features/listing-19-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-02/Cargo.lock b/listings/ch19-advanced-features/listing-19-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-02/Cargo.toml b/listings/ch19-advanced-features/listing-19-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-02/src/main.rs b/listings/ch19-advanced-features/listing-19-02/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-03/Cargo.lock b/listings/ch19-advanced-features/listing-19-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-03/Cargo.toml b/listings/ch19-advanced-features/listing-19-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-03/src/main.rs b/listings/ch19-advanced-features/listing-19-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-04/Cargo.lock b/listings/ch19-advanced-features/listing-19-04/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-04/Cargo.toml b/listings/ch19-advanced-features/listing-19-04/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-04/src/main.rs b/listings/ch19-advanced-features/listing-19-04/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-05/Cargo.lock b/listings/ch19-advanced-features/listing-19-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-05/Cargo.toml b/listings/ch19-advanced-features/listing-19-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-05/output.txt b/listings/ch19-advanced-features/listing-19-05/output.txt
old mode 100755
new mode 100644
index f4b7582..44bcc09
--- a/listings/ch19-advanced-features/listing-19-05/output.txt
+++ b/listings/ch19-advanced-features/listing-19-05/output.txt
@@ -14,4 +14,4 @@ error[E0499]: cannot borrow `*values` as mutable more than once at a time
   |     returning this value requires that `*values` is borrowed for `'1`
 
 For more information about this error, try `rustc --explain E0499`.
-error: could not compile `unsafe-example` due to previous error
+error: could not compile `unsafe-example` (bin "unsafe-example") due to 1 previous error
diff --git a/listings/ch19-advanced-features/listing-19-05/src/main.rs b/listings/ch19-advanced-features/listing-19-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-06/Cargo.lock b/listings/ch19-advanced-features/listing-19-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-06/Cargo.toml b/listings/ch19-advanced-features/listing-19-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-06/src/main.rs b/listings/ch19-advanced-features/listing-19-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-07/Cargo.lock b/listings/ch19-advanced-features/listing-19-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-07/Cargo.toml b/listings/ch19-advanced-features/listing-19-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-07/src/main.rs b/listings/ch19-advanced-features/listing-19-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-08/Cargo.lock b/listings/ch19-advanced-features/listing-19-08/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-08/Cargo.toml b/listings/ch19-advanced-features/listing-19-08/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-08/src/main.rs b/listings/ch19-advanced-features/listing-19-08/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-09/Cargo.lock b/listings/ch19-advanced-features/listing-19-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-09/Cargo.toml b/listings/ch19-advanced-features/listing-19-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-09/src/main.rs b/listings/ch19-advanced-features/listing-19-09/src/main.rs
old mode 100755
new mode 100644
index 82a4b42..fda5179
--- a/listings/ch19-advanced-features/listing-19-09/src/main.rs
+++ b/listings/ch19-advanced-features/listing-19-09/src/main.rs
@@ -1,5 +1,5 @@
 static HELLO_WORLD: &str = "Hello, world!";
 
 fn main() {
-    println!("name is: {}", HELLO_WORLD);
+    println!("name is: {HELLO_WORLD}");
 }
diff --git a/listings/ch19-advanced-features/listing-19-10/Cargo.lock b/listings/ch19-advanced-features/listing-19-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-10/Cargo.toml b/listings/ch19-advanced-features/listing-19-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-10/src/main.rs b/listings/ch19-advanced-features/listing-19-10/src/main.rs
old mode 100755
new mode 100644
index e8dab68..b5559fd
--- a/listings/ch19-advanced-features/listing-19-10/src/main.rs
+++ b/listings/ch19-advanced-features/listing-19-10/src/main.rs
@@ -10,6 +10,6 @@ fn main() {
     add_to_count(3);
 
     unsafe {
-        println!("COUNTER: {}", COUNTER);
+        println!("COUNTER: {COUNTER}");
     }
 }
diff --git a/listings/ch19-advanced-features/listing-19-11/Cargo.lock b/listings/ch19-advanced-features/listing-19-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-11/Cargo.toml b/listings/ch19-advanced-features/listing-19-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-11/src/main.rs b/listings/ch19-advanced-features/listing-19-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-12/Cargo.lock b/listings/ch19-advanced-features/listing-19-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-12/Cargo.toml b/listings/ch19-advanced-features/listing-19-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-12/src/lib.rs b/listings/ch19-advanced-features/listing-19-12/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-13/Cargo.lock b/listings/ch19-advanced-features/listing-19-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-13/Cargo.toml b/listings/ch19-advanced-features/listing-19-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-13/src/lib.rs b/listings/ch19-advanced-features/listing-19-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-14/Cargo.lock b/listings/ch19-advanced-features/listing-19-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-14/Cargo.toml b/listings/ch19-advanced-features/listing-19-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-14/src/main.rs b/listings/ch19-advanced-features/listing-19-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-15/Cargo.lock b/listings/ch19-advanced-features/listing-19-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-15/Cargo.toml b/listings/ch19-advanced-features/listing-19-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-15/src/lib.rs b/listings/ch19-advanced-features/listing-19-15/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-16/Cargo.lock b/listings/ch19-advanced-features/listing-19-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-16/Cargo.toml b/listings/ch19-advanced-features/listing-19-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-16/src/main.rs b/listings/ch19-advanced-features/listing-19-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-17/Cargo.lock b/listings/ch19-advanced-features/listing-19-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-17/Cargo.toml b/listings/ch19-advanced-features/listing-19-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-17/src/main.rs b/listings/ch19-advanced-features/listing-19-17/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-18/Cargo.lock b/listings/ch19-advanced-features/listing-19-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-18/Cargo.toml b/listings/ch19-advanced-features/listing-19-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-18/output.txt b/listings/ch19-advanced-features/listing-19-18/output.txt
old mode 100755
new mode 100644
index 2e9da17..d7e315b
--- a/listings/ch19-advanced-features/listing-19-18/output.txt
+++ b/listings/ch19-advanced-features/listing-19-18/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling traits-example v0.1.0 (file:///projects/traits-example)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.46s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.46s
      Running `target/debug/traits-example`
 This is your captain speaking.
 Up!
diff --git a/listings/ch19-advanced-features/listing-19-18/src/main.rs b/listings/ch19-advanced-features/listing-19-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-19/Cargo.lock b/listings/ch19-advanced-features/listing-19-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-19/Cargo.toml b/listings/ch19-advanced-features/listing-19-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-19/output.txt b/listings/ch19-advanced-features/listing-19-19/output.txt
old mode 100755
new mode 100644
index 087e802..b6e283f
--- a/listings/ch19-advanced-features/listing-19-19/output.txt
+++ b/listings/ch19-advanced-features/listing-19-19/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling traits-example v0.1.0 (file:///projects/traits-example)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.54s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s
      Running `target/debug/traits-example`
 A baby dog is called a Spot
diff --git a/listings/ch19-advanced-features/listing-19-19/src/main.rs b/listings/ch19-advanced-features/listing-19-19/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-20/Cargo.lock b/listings/ch19-advanced-features/listing-19-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-20/Cargo.toml b/listings/ch19-advanced-features/listing-19-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-20/output.txt b/listings/ch19-advanced-features/listing-19-20/output.txt
old mode 100755
new mode 100644
index a3b281e..0e78ae2
--- a/listings/ch19-advanced-features/listing-19-20/output.txt
+++ b/listings/ch19-advanced-features/listing-19-20/output.txt
@@ -7,12 +7,12 @@ error[E0790]: cannot call associated function on trait without specifying the co
    |     ------------------------- `Animal::baby_name` defined here
 ...
 20 |     println!("A baby dog is called a {}", Animal::baby_name());
-   |                                           ^^^^^^^^^^^^^^^^^ cannot call associated function of trait
+   |                                           ^^^^^^^^^^^^^^^^^^^ cannot call associated function of trait
    |
 help: use the fully-qualified path to the only available implementation
    |
-20 |     println!("A baby dog is called a {}", <::Dog as Animal>::baby_name());
-   |                                           +++++++++       +
+20 |     println!("A baby dog is called a {}", <Dog as Animal>::baby_name());
+   |                                           +++++++       +
 
 For more information about this error, try `rustc --explain E0790`.
-error: could not compile `traits-example` due to previous error
+error: could not compile `traits-example` (bin "traits-example") due to 1 previous error
diff --git a/listings/ch19-advanced-features/listing-19-20/src/main.rs b/listings/ch19-advanced-features/listing-19-20/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-21/Cargo.lock b/listings/ch19-advanced-features/listing-19-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-21/Cargo.toml b/listings/ch19-advanced-features/listing-19-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-21/output.txt b/listings/ch19-advanced-features/listing-19-21/output.txt
old mode 100755
new mode 100644
index 4d1ee5a..f59d0bc
--- a/listings/ch19-advanced-features/listing-19-21/output.txt
+++ b/listings/ch19-advanced-features/listing-19-21/output.txt
@@ -1,5 +1,5 @@
 $ cargo run
    Compiling traits-example v0.1.0 (file:///projects/traits-example)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
      Running `target/debug/traits-example`
 A baby dog is called a puppy
diff --git a/listings/ch19-advanced-features/listing-19-21/src/main.rs b/listings/ch19-advanced-features/listing-19-21/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-22/Cargo.lock b/listings/ch19-advanced-features/listing-19-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-22/Cargo.toml b/listings/ch19-advanced-features/listing-19-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-22/src/main.rs b/listings/ch19-advanced-features/listing-19-22/src/main.rs
old mode 100755
new mode 100644
index febe58b..7069fef
--- a/listings/ch19-advanced-features/listing-19-22/src/main.rs
+++ b/listings/ch19-advanced-features/listing-19-22/src/main.rs
@@ -7,7 +7,7 @@ trait OutlinePrint: fmt::Display {
         let len = output.len();
         println!("{}", "*".repeat(len + 4));
         println!("*{}*", " ".repeat(len + 2));
-        println!("* {} *", output);
+        println!("* {output} *");
         println!("*{}*", " ".repeat(len + 2));
         println!("{}", "*".repeat(len + 4));
     }
diff --git a/listings/ch19-advanced-features/listing-19-23/Cargo.lock b/listings/ch19-advanced-features/listing-19-23/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-23/Cargo.toml b/listings/ch19-advanced-features/listing-19-23/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-23/src/main.rs b/listings/ch19-advanced-features/listing-19-23/src/main.rs
old mode 100755
new mode 100644
index eae46c9..f8c8366
--- a/listings/ch19-advanced-features/listing-19-23/src/main.rs
+++ b/listings/ch19-advanced-features/listing-19-23/src/main.rs
@@ -10,5 +10,5 @@ impl fmt::Display for Wrapper {
 
 fn main() {
     let w = Wrapper(vec![String::from("hello"), String::from("world")]);
-    println!("w = {}", w);
+    println!("w = {w}");
 }
diff --git a/listings/ch19-advanced-features/listing-19-24/Cargo.lock b/listings/ch19-advanced-features/listing-19-24/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-24/Cargo.toml b/listings/ch19-advanced-features/listing-19-24/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-24/src/main.rs b/listings/ch19-advanced-features/listing-19-24/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-25/Cargo.lock b/listings/ch19-advanced-features/listing-19-25/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-25/Cargo.toml b/listings/ch19-advanced-features/listing-19-25/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-25/src/main.rs b/listings/ch19-advanced-features/listing-19-25/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-27/Cargo.lock b/listings/ch19-advanced-features/listing-19-27/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-27/Cargo.toml b/listings/ch19-advanced-features/listing-19-27/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-27/src/main.rs b/listings/ch19-advanced-features/listing-19-27/src/main.rs
old mode 100755
new mode 100644
index 91b2cf0..312df24
--- a/listings/ch19-advanced-features/listing-19-27/src/main.rs
+++ b/listings/ch19-advanced-features/listing-19-27/src/main.rs
@@ -9,5 +9,5 @@ fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
 fn main() {
     let answer = do_twice(add_one, 5);
 
-    println!("The answer is: {}", answer);
+    println!("The answer is: {answer}");
 }
diff --git a/listings/ch19-advanced-features/listing-19-28/Cargo.lock b/listings/ch19-advanced-features/listing-19-28/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-28/Cargo.toml b/listings/ch19-advanced-features/listing-19-28/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-28/src/lib.rs b/listings/ch19-advanced-features/listing-19-28/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-30/Cargo.lock b/listings/ch19-advanced-features/listing-19-30/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-30/Cargo.toml b/listings/ch19-advanced-features/listing-19-30/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-30/src/main.rs b/listings/ch19-advanced-features/listing-19-30/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.lock b/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.toml b/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.lock b/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.lock
old mode 100755
new mode 100644
index 9a38c8a..6be987b
--- a/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.lock
+++ b/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.lock
@@ -1,46 +1,46 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "hello_macro_derive"
 version = "0.1.0"
 dependencies = [
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote",
+ "syn",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.8"
+version = "1.0.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a56dea16b0a29e94408b9aa5e2940a4eedbd128a1ba20e8f7ae60fd3d465af0e"
 dependencies = [
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.2"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
 ]
 
 [[package]]
 name = "syn"
-version = "1.0.14"
+version = "2.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a6531ffc7b071655e4ce2e04bd464c4830bb585a61cabb96cf808f05172615a"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.0"
+name = "unicode-ident"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
-"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
-"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.toml b/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.toml
old mode 100755
new mode 100644
index aa076ac..ed9e917
--- a/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.toml
+++ b/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.toml
@@ -7,5 +7,5 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 quote = "1.0"
diff --git a/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs b/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs
old mode 100755
new mode 100644
index 11643a8..839ec83
--- a/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs
+++ b/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs
@@ -1,6 +1,5 @@
 use proc_macro::TokenStream;
 use quote::quote;
-use syn;
 
 #[proc_macro_derive(HelloMacro)]
 pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
diff --git a/listings/ch19-advanced-features/listing-19-31/hello_macro/src/lib.rs b/listings/ch19-advanced-features/listing-19-31/hello_macro/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-31/hello_macro/src/main.rs b/listings/ch19-advanced-features/listing-19-31/hello_macro/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.lock b/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.toml b/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.lock b/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.lock
old mode 100755
new mode 100644
index 9a38c8a..6be987b
--- a/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.lock
+++ b/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.lock
@@ -1,46 +1,46 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "hello_macro_derive"
 version = "0.1.0"
 dependencies = [
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote",
+ "syn",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.8"
+version = "1.0.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a56dea16b0a29e94408b9aa5e2940a4eedbd128a1ba20e8f7ae60fd3d465af0e"
 dependencies = [
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.2"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
 ]
 
 [[package]]
 name = "syn"
-version = "1.0.14"
+version = "2.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a6531ffc7b071655e4ce2e04bd464c4830bb585a61cabb96cf808f05172615a"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.0"
+name = "unicode-ident"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
-"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
-"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml b/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml
old mode 100755
new mode 100644
index aa076ac..ed9e917
--- a/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml
+++ b/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml
@@ -7,5 +7,5 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 quote = "1.0"
diff --git a/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs b/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs
old mode 100755
new mode 100644
index dac6c98..ba1215f
--- a/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs
+++ b/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs
@@ -1,6 +1,5 @@
 use proc_macro::TokenStream;
 use quote::quote;
-use syn;
 
 #[proc_macro_derive(HelloMacro)]
 pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
diff --git a/listings/ch19-advanced-features/listing-19-33/hello_macro/src/lib.rs b/listings/ch19-advanced-features/listing-19-33/hello_macro/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/listing-19-33/hello_macro/src/main.rs b/listings/ch19-advanced-features/listing-19-33/hello_macro/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.lock b/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.toml b/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-01-unsafe-fn/src/main.rs b/listings/ch19-advanced-features/no-listing-01-unsafe-fn/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.lock b/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.toml b/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/output.txt b/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/output.txt
old mode 100755
new mode 100644
index 0991f10..41af686
--- a/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/output.txt
+++ b/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/output.txt
@@ -1,10 +1,10 @@
 $ cargo run
    Compiling traits-example v0.1.0 (file:///projects/traits-example)
 error[E0277]: `Point` doesn't implement `std::fmt::Display`
-  --> src/main.rs:20:6
+  --> src/main.rs:20:23
    |
 20 | impl OutlinePrint for Point {}
-   |      ^^^^^^^^^^^^ `Point` cannot be formatted with the default formatter
+   |                       ^^^^^ `Point` cannot be formatted with the default formatter
    |
    = help: the trait `std::fmt::Display` is not implemented for `Point`
    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
@@ -14,5 +14,21 @@ note: required by a bound in `OutlinePrint`
 3  | trait OutlinePrint: fmt::Display {
    |                     ^^^^^^^^^^^^ required by this bound in `OutlinePrint`
 
+error[E0277]: `Point` doesn't implement `std::fmt::Display`
+  --> src/main.rs:24:7
+   |
+24 |     p.outline_print();
+   |       ^^^^^^^^^^^^^ `Point` cannot be formatted with the default formatter
+   |
+   = help: the trait `std::fmt::Display` is not implemented for `Point`
+   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
+note: required by a bound in `OutlinePrint::outline_print`
+  --> src/main.rs:3:21
+   |
+3  | trait OutlinePrint: fmt::Display {
+   |                     ^^^^^^^^^^^^ required by this bound in `OutlinePrint::outline_print`
+4  |     fn outline_print(&self) {
+   |        ------------- required by a bound in this associated function
+
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `traits-example` due to previous error
+error: could not compile `traits-example` (bin "traits-example") due to 2 previous errors
diff --git a/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/src/main.rs b/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/src/main.rs
old mode 100755
new mode 100644
index a1e2fe4..0e45f3c
--- a/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/src/main.rs
+++ b/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/src/main.rs
@@ -6,7 +6,7 @@ trait OutlinePrint: fmt::Display {
         let len = output.len();
         println!("{}", "*".repeat(len + 4));
         println!("*{}*", " ".repeat(len + 2));
-        println!("* {} *", output);
+        println!("* {output} *");
         println!("*{}*", " ".repeat(len + 2));
         println!("{}", "*".repeat(len + 4));
     }
diff --git a/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.lock b/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.toml b/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/src/main.rs b/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/src/main.rs
old mode 100755
new mode 100644
index c7bbb6a..fa5be1c
--- a/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/src/main.rs
+++ b/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/src/main.rs
@@ -4,7 +4,7 @@ trait OutlinePrint: fmt::Display {
         let len = output.len();
         println!("{}", "*".repeat(len + 4));
         println!("*{}*", " ".repeat(len + 2));
-        println!("* {} *", output);
+        println!("* {output} *");
         println!("*{}*", " ".repeat(len + 2));
         println!("{}", "*".repeat(len + 4));
     }
diff --git a/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.lock b/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.toml b/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-04-kilometers-alias/src/main.rs b/listings/ch19-advanced-features/no-listing-04-kilometers-alias/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.lock b/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.toml b/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-05-write-trait/src/lib.rs b/listings/ch19-advanced-features/no-listing-05-write-trait/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.lock b/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.toml b/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-06-result-alias/src/lib.rs b/listings/ch19-advanced-features/no-listing-06-result-alias/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.lock b/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.toml b/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-07-never-type/src/lib.rs b/listings/ch19-advanced-features/no-listing-07-never-type/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.lock b/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.toml b/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/src/main.rs b/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.lock b/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.toml b/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-09-unwrap-definition/src/lib.rs b/listings/ch19-advanced-features/no-listing-09-unwrap-definition/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.lock b/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.toml b/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-10-loop-returns-never/src/main.rs b/listings/ch19-advanced-features/no-listing-10-loop-returns-never/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.lock b/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.toml b/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-11-cant-create-str/src/main.rs b/listings/ch19-advanced-features/no-listing-11-cant-create-str/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.lock b/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.toml b/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/src/lib.rs b/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.lock b/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.toml b/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/src/lib.rs b/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.lock b/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.toml b/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/src/lib.rs b/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.lock b/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.toml b/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-15-map-closure/src/main.rs b/listings/ch19-advanced-features/no-listing-15-map-closure/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.lock b/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.toml b/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-16-map-function/src/main.rs b/listings/ch19-advanced-features/no-listing-16-map-function/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.lock b/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.toml b/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-17-map-initializer/src/main.rs b/listings/ch19-advanced-features/no-listing-17-map-initializer/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.lock b/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.toml b/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt b/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt
old mode 100755
new mode 100644
index 104f2cf..bc736bd
--- a/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt
+++ b/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt
@@ -6,11 +6,15 @@ error[E0746]: return type cannot have an unboxed trait object
 1 | fn returns_closure() -> dyn Fn(i32) -> i32 {
   |                         ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
-  = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
-help: use `impl Fn(i32) -> i32` as the return type, as all return paths are of type `[closure@src/lib.rs:2:5: 2:8]`, which implements `Fn(i32) -> i32`
+help: return an `impl Trait` instead of a `dyn Trait`, if all returned values are the same type
   |
 1 | fn returns_closure() -> impl Fn(i32) -> i32 {
-  |                         ~~~~~~~~~~~~~~~~~~~
+  |                         ~~~~
+help: box the return type, and wrap all of the returned values in `Box::new`
+  |
+1 ~ fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
+2 ~     Box::new(|x| x + 1)
+  |
 
 For more information about this error, try `rustc --explain E0746`.
-error: could not compile `functions-example` due to previous error
+error: could not compile `functions-example` (lib) due to 1 previous error
diff --git a/listings/ch19-advanced-features/no-listing-18-returns-closure/src/lib.rs b/listings/ch19-advanced-features/no-listing-18-returns-closure/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.lock b/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.toml b/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/src/lib.rs b/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.lock b/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.toml b/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/src/lib.rs b/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.lock b/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.toml b/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/src/main.rs b/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.lock b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.toml b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.lock b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.lock
old mode 100755
new mode 100644
index 9a38c8a..6be987b
--- a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.lock
+++ b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.lock
@@ -1,46 +1,46 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "hello_macro_derive"
 version = "0.1.0"
 dependencies = [
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote",
+ "syn",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.8"
+version = "1.0.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a56dea16b0a29e94408b9aa5e2940a4eedbd128a1ba20e8f7ae60fd3d465af0e"
 dependencies = [
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.2"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
 ]
 
 [[package]]
 name = "syn"
-version = "1.0.14"
+version = "2.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a6531ffc7b071655e4ce2e04bd464c4830bb585a61cabb96cf808f05172615a"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.0"
+name = "unicode-ident"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
-"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
-"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml
old mode 100755
new mode 100644
index aa076ac..ed9e917
--- a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml
+++ b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml
@@ -7,5 +7,5 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 quote = "1.0"
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs
old mode 100755
new mode 100644
index 5e0b96c..654b6be
--- a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs
+++ b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs
@@ -1,6 +1,5 @@
 use proc_macro::TokenStream;
 use quote::quote;
-use syn;
 
 #[proc_macro_derive(HelloMacro)]
 pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/lib.rs b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/main.rs b/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.lock b/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.lock
old mode 100755
new mode 100644
index dee23ec..3849f15
--- a/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.lock
+++ b/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "hello_macro"
 version = "0.1.0"
@@ -8,51 +10,49 @@ version = "0.1.0"
 name = "hello_macro_derive"
 version = "0.1.0"
 dependencies = [
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote",
+ "syn",
 ]
 
 [[package]]
 name = "pancakes"
 version = "0.1.0"
 dependencies = [
- "hello_macro 0.1.0",
- "hello_macro_derive 0.1.0",
+ "hello_macro",
+ "hello_macro_derive",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.8"
+version = "1.0.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a56dea16b0a29e94408b9aa5e2940a4eedbd128a1ba20e8f7ae60fd3d465af0e"
 dependencies = [
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.2"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
 ]
 
 [[package]]
 name = "syn"
-version = "1.0.14"
+version = "2.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a6531ffc7b071655e4ce2e04bd464c4830bb585a61cabb96cf808f05172615a"
 dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.0"
+name = "unicode-ident"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
-"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
-"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.toml b/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/src/main.rs b/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.lock b/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.toml b/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/src/lib.rs b/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.lock b/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.toml b/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch19-advanced-features/output-only-01-missing-unsafe/output.txt b/listings/ch19-advanced-features/output-only-01-missing-unsafe/output.txt
old mode 100755
new mode 100644
index 5886bc6..b14994c
--- a/listings/ch19-advanced-features/output-only-01-missing-unsafe/output.txt
+++ b/listings/ch19-advanced-features/output-only-01-missing-unsafe/output.txt
@@ -1,6 +1,6 @@
 $ cargo run
    Compiling unsafe-example v0.1.0 (file:///projects/unsafe-example)
-error[E0133]: call to unsafe function is unsafe and requires unsafe function or block
+error[E0133]: call to unsafe function `dangerous` is unsafe and requires unsafe function or block
  --> src/main.rs:4:5
   |
 4 |     dangerous();
@@ -9,4 +9,4 @@ error[E0133]: call to unsafe function is unsafe and requires unsafe function or
   = note: consult the function's documentation for information on how to avoid undefined behavior
 
 For more information about this error, try `rustc --explain E0133`.
-error: could not compile `unsafe-example` due to previous error
+error: could not compile `unsafe-example` (bin "unsafe-example") due to 1 previous error
diff --git a/listings/ch19-advanced-features/output-only-01-missing-unsafe/src/main.rs b/listings/ch19-advanced-features/output-only-01-missing-unsafe/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-01/Cargo.lock b/listings/ch20-web-server/listing-20-01/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-01/Cargo.toml b/listings/ch20-web-server/listing-20-01/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-01/src/main.rs b/listings/ch20-web-server/listing-20-01/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-02/Cargo.lock b/listings/ch20-web-server/listing-20-02/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-02/Cargo.toml b/listings/ch20-web-server/listing-20-02/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-02/src/main.rs b/listings/ch20-web-server/listing-20-02/src/main.rs
old mode 100755
new mode 100644
index 7240c73..f139846
--- a/listings/ch20-web-server/listing-20-02/src/main.rs
+++ b/listings/ch20-web-server/listing-20-02/src/main.rs
@@ -21,5 +21,5 @@ fn handle_connection(mut stream: TcpStream) {
         .take_while(|line| !line.is_empty())
         .collect();
 
-    println!("Request: {:#?}", http_request);
+    println!("Request: {http_request:#?}");
 }
diff --git a/listings/ch20-web-server/listing-20-03/Cargo.lock b/listings/ch20-web-server/listing-20-03/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-03/Cargo.toml b/listings/ch20-web-server/listing-20-03/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-03/src/main.rs b/listings/ch20-web-server/listing-20-03/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-04/Cargo.lock b/listings/ch20-web-server/listing-20-04/Cargo.lock
deleted file mode 100755
index f2d069f..0000000
--- a/listings/ch20-web-server/listing-20-04/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "hello"
-version = "0.1.0"
-
diff --git a/listings/ch20-web-server/listing-20-04/Cargo.toml b/listings/ch20-web-server/listing-20-04/Cargo.toml
deleted file mode 100755
index fe61947..0000000
--- a/listings/ch20-web-server/listing-20-04/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "hello"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch20-web-server/listing-20-04/hello.html b/listings/ch20-web-server/listing-20-04/hello.html
deleted file mode 100755
index fe442d6..0000000
--- a/listings/ch20-web-server/listing-20-04/hello.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Hello!</title>
-  </head>
-  <body>
-    <h1>Hello!</h1>
-    <p>Hi from Rust</p>
-  </body>
-</html>
diff --git a/listings/ch20-web-server/listing-20-04/src/main.rs b/listings/ch20-web-server/listing-20-04/src/main.rs
deleted file mode 100755
index 818eac9..0000000
--- a/listings/ch20-web-server/listing-20-04/src/main.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        handle_connection(stream);
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-
-    stream.read(&mut buffer).unwrap();
-
-    let response = "HTTP/1.1 200 OK\r\n\r\n";
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-05/Cargo.lock b/listings/ch20-web-server/listing-20-05/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-05/Cargo.toml b/listings/ch20-web-server/listing-20-05/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-05/hello.html b/listings/ch20-web-server/listing-20-05/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-05/src/main.rs b/listings/ch20-web-server/listing-20-05/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-06/Cargo.lock b/listings/ch20-web-server/listing-20-06/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-06/Cargo.toml b/listings/ch20-web-server/listing-20-06/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-06/hello.html b/listings/ch20-web-server/listing-20-06/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-06/src/main.rs b/listings/ch20-web-server/listing-20-06/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-07/404.html b/listings/ch20-web-server/listing-20-07/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-07/Cargo.lock b/listings/ch20-web-server/listing-20-07/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-07/Cargo.toml b/listings/ch20-web-server/listing-20-07/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-07/hello.html b/listings/ch20-web-server/listing-20-07/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-07/src/main.rs b/listings/ch20-web-server/listing-20-07/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-08/404.html b/listings/ch20-web-server/listing-20-08/404.html
deleted file mode 100755
index 88d8e91..0000000
--- a/listings/ch20-web-server/listing-20-08/404.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Hello!</title>
-  </head>
-  <body>
-    <h1>Oops!</h1>
-    <p>Sorry, I don't know what you're asking for.</p>
-  </body>
-</html>
diff --git a/listings/ch20-web-server/listing-20-08/Cargo.lock b/listings/ch20-web-server/listing-20-08/Cargo.lock
deleted file mode 100755
index f2d069f..0000000
--- a/listings/ch20-web-server/listing-20-08/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "hello"
-version = "0.1.0"
-
diff --git a/listings/ch20-web-server/listing-20-08/Cargo.toml b/listings/ch20-web-server/listing-20-08/Cargo.toml
deleted file mode 100755
index fe61947..0000000
--- a/listings/ch20-web-server/listing-20-08/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "hello"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch20-web-server/listing-20-08/hello.html b/listings/ch20-web-server/listing-20-08/hello.html
deleted file mode 100755
index fe442d6..0000000
--- a/listings/ch20-web-server/listing-20-08/hello.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Hello!</title>
-  </head>
-  <body>
-    <h1>Hello!</h1>
-    <p>Hi from Rust</p>
-  </body>
-</html>
diff --git a/listings/ch20-web-server/listing-20-08/src/main.rs b/listings/ch20-web-server/listing-20-08/src/main.rs
deleted file mode 100755
index 6dfaa97..0000000
--- a/listings/ch20-web-server/listing-20-08/src/main.rs
+++ /dev/null
@@ -1,47 +0,0 @@
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        handle_connection(stream);
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-
-    if buffer.starts_with(get) {
-        let contents = fs::read_to_string("hello.html").unwrap();
-
-        let response = format!(
-            "HTTP/1.1 200 OK\r\nContent-Length: {}\r\n\r\n{}",
-            contents.len(),
-            contents
-        );
-
-        stream.write(response.as_bytes()).unwrap();
-        stream.flush().unwrap();
-    } else {
-        let status_line = "HTTP/1.1 404 NOT FOUND";
-        let contents = fs::read_to_string("404.html").unwrap();
-
-        let response = format!(
-            "{}\r\nContent-Length: {}\r\n\r\n{}",
-            status_line,
-            contents.len(),
-            contents
-        );
-
-        stream.write(response.as_bytes()).unwrap();
-        stream.flush().unwrap();
-    }
-}
diff --git a/listings/ch20-web-server/listing-20-09/404.html b/listings/ch20-web-server/listing-20-09/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-09/Cargo.lock b/listings/ch20-web-server/listing-20-09/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-09/Cargo.toml b/listings/ch20-web-server/listing-20-09/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-09/hello.html b/listings/ch20-web-server/listing-20-09/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-09/src/main.rs b/listings/ch20-web-server/listing-20-09/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-10/404.html b/listings/ch20-web-server/listing-20-10/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-10/Cargo.lock b/listings/ch20-web-server/listing-20-10/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-10/Cargo.toml b/listings/ch20-web-server/listing-20-10/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-10/hello.html b/listings/ch20-web-server/listing-20-10/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-10/src/main.rs b/listings/ch20-web-server/listing-20-10/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-11/404.html b/listings/ch20-web-server/listing-20-11/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-11/Cargo.lock b/listings/ch20-web-server/listing-20-11/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-11/Cargo.toml b/listings/ch20-web-server/listing-20-11/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-11/hello.html b/listings/ch20-web-server/listing-20-11/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-11/src/main.rs b/listings/ch20-web-server/listing-20-11/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-12/404.html b/listings/ch20-web-server/listing-20-12/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-12/Cargo.lock b/listings/ch20-web-server/listing-20-12/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-12/Cargo.toml b/listings/ch20-web-server/listing-20-12/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-12/hello.html b/listings/ch20-web-server/listing-20-12/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-12/output.txt b/listings/ch20-web-server/listing-20-12/output.txt
old mode 100755
new mode 100644
index 57a58b9..0faae99
--- a/listings/ch20-web-server/listing-20-12/output.txt
+++ b/listings/ch20-web-server/listing-20-12/output.txt
@@ -7,4 +7,4 @@ error[E0433]: failed to resolve: use of undeclared type `ThreadPool`
    |                ^^^^^^^^^^ use of undeclared type `ThreadPool`
 
 For more information about this error, try `rustc --explain E0433`.
-error: could not compile `hello` due to previous error
+error: could not compile `hello` (bin "hello") due to 1 previous error
diff --git a/listings/ch20-web-server/listing-20-12/src/main.rs b/listings/ch20-web-server/listing-20-12/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-13/404.html b/listings/ch20-web-server/listing-20-13/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-13/Cargo.lock b/listings/ch20-web-server/listing-20-13/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-13/Cargo.toml b/listings/ch20-web-server/listing-20-13/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-13/hello.html b/listings/ch20-web-server/listing-20-13/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-13/src/bin/main.rs b/listings/ch20-web-server/listing-20-13/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-13/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-13/src/lib.rs b/listings/ch20-web-server/listing-20-13/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-13/src/main.rs b/listings/ch20-web-server/listing-20-13/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-14/404.html b/listings/ch20-web-server/listing-20-14/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-14/Cargo.lock b/listings/ch20-web-server/listing-20-14/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-14/Cargo.toml b/listings/ch20-web-server/listing-20-14/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-14/hello.html b/listings/ch20-web-server/listing-20-14/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-14/src/bin/main.rs b/listings/ch20-web-server/listing-20-14/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-14/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-14/src/lib.rs b/listings/ch20-web-server/listing-20-14/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-14/src/main.rs b/listings/ch20-web-server/listing-20-14/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-15/404.html b/listings/ch20-web-server/listing-20-15/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-15/Cargo.lock b/listings/ch20-web-server/listing-20-15/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-15/Cargo.toml b/listings/ch20-web-server/listing-20-15/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-15/hello.html b/listings/ch20-web-server/listing-20-15/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-15/src/bin/main.rs b/listings/ch20-web-server/listing-20-15/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-15/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-15/src/lib.rs b/listings/ch20-web-server/listing-20-15/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-15/src/main.rs b/listings/ch20-web-server/listing-20-15/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-16/404.html b/listings/ch20-web-server/listing-20-16/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-16/Cargo.lock b/listings/ch20-web-server/listing-20-16/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-16/Cargo.toml b/listings/ch20-web-server/listing-20-16/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-16/hello.html b/listings/ch20-web-server/listing-20-16/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-16/src/bin/main.rs b/listings/ch20-web-server/listing-20-16/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-16/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-16/src/lib.rs b/listings/ch20-web-server/listing-20-16/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-16/src/main.rs b/listings/ch20-web-server/listing-20-16/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-17/404.html b/listings/ch20-web-server/listing-20-17/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-17/Cargo.lock b/listings/ch20-web-server/listing-20-17/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-17/Cargo.toml b/listings/ch20-web-server/listing-20-17/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-17/hello.html b/listings/ch20-web-server/listing-20-17/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-17/output.txt b/listings/ch20-web-server/listing-20-17/output.txt
old mode 100755
new mode 100644
index 8bedfec..cd06ca1
--- a/listings/ch20-web-server/listing-20-17/output.txt
+++ b/listings/ch20-web-server/listing-20-17/output.txt
@@ -6,8 +6,16 @@ error[E0382]: use of moved value: `receiver`
 21 |         let (sender, receiver) = mpsc::channel();
    |                      -------- move occurs because `receiver` has type `std::sync::mpsc::Receiver<Job>`, which does not implement the `Copy` trait
 ...
+25 |         for id in 0..size {
+   |         ----------------- inside of this loop
 26 |             workers.push(Worker::new(id, receiver));
    |                                          ^^^^^^^^ value moved here, in previous iteration of loop
+   |
+note: consider changing this parameter type in method `new` to borrow instead if owning the value isn't necessary
+  --> src/lib.rs:47:33
+   |
+47 |     fn new(id: usize, receiver: mpsc::Receiver<Job>) -> Worker {
+   |        --- in this method       ^^^^^^^^^^^^^^^^^^^ this parameter takes ownership of the value
 
 For more information about this error, try `rustc --explain E0382`.
-error: could not compile `hello` due to previous error
+error: could not compile `hello` (lib) due to 1 previous error
diff --git a/listings/ch20-web-server/listing-20-17/src/bin/main.rs b/listings/ch20-web-server/listing-20-17/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-17/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-17/src/lib.rs b/listings/ch20-web-server/listing-20-17/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-17/src/main.rs b/listings/ch20-web-server/listing-20-17/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-18/404.html b/listings/ch20-web-server/listing-20-18/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-18/Cargo.lock b/listings/ch20-web-server/listing-20-18/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-18/Cargo.toml b/listings/ch20-web-server/listing-20-18/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-18/hello.html b/listings/ch20-web-server/listing-20-18/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-18/src/bin/main.rs b/listings/ch20-web-server/listing-20-18/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-18/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-18/src/lib.rs b/listings/ch20-web-server/listing-20-18/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-18/src/main.rs b/listings/ch20-web-server/listing-20-18/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-19/404.html b/listings/ch20-web-server/listing-20-19/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-19/Cargo.lock b/listings/ch20-web-server/listing-20-19/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-19/Cargo.toml b/listings/ch20-web-server/listing-20-19/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-19/hello.html b/listings/ch20-web-server/listing-20-19/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-19/src/bin/main.rs b/listings/ch20-web-server/listing-20-19/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-19/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-19/src/lib.rs b/listings/ch20-web-server/listing-20-19/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-19/src/main.rs b/listings/ch20-web-server/listing-20-19/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-20/404.html b/listings/ch20-web-server/listing-20-20/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-20/Cargo.lock b/listings/ch20-web-server/listing-20-20/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-20/Cargo.toml b/listings/ch20-web-server/listing-20-20/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-20/hello.html b/listings/ch20-web-server/listing-20-20/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-20/src/bin/main.rs b/listings/ch20-web-server/listing-20-20/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-20/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-20/src/lib.rs b/listings/ch20-web-server/listing-20-20/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-20/src/main.rs b/listings/ch20-web-server/listing-20-20/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-21/404.html b/listings/ch20-web-server/listing-20-21/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-21/Cargo.lock b/listings/ch20-web-server/listing-20-21/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-21/Cargo.toml b/listings/ch20-web-server/listing-20-21/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-21/hello.html b/listings/ch20-web-server/listing-20-21/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-21/src/bin/main.rs b/listings/ch20-web-server/listing-20-21/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-21/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-21/src/lib.rs b/listings/ch20-web-server/listing-20-21/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-21/src/main.rs b/listings/ch20-web-server/listing-20-21/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-22/404.html b/listings/ch20-web-server/listing-20-22/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-22/Cargo.lock b/listings/ch20-web-server/listing-20-22/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-22/Cargo.toml b/listings/ch20-web-server/listing-20-22/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-22/hello.html b/listings/ch20-web-server/listing-20-22/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-22/output.txt b/listings/ch20-web-server/listing-20-22/output.txt
old mode 100755
new mode 100644
index a6c9e8d..08a28cc
--- a/listings/ch20-web-server/listing-20-22/output.txt
+++ b/listings/ch20-web-server/listing-20-22/output.txt
@@ -8,7 +8,8 @@ error[E0507]: cannot move out of `worker.thread` which is behind a mutable refer
    |             |
    |             move occurs because `worker.thread` has type `JoinHandle<()>`, which does not implement the `Copy` trait
    |
-note: this function takes ownership of the receiver `self`, which moves `worker.thread`
+note: `JoinHandle::<T>::join` takes ownership of the receiver `self`, which moves `worker.thread`
+  --> /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library/std/src/thread/mod.rs:1657:17
 
 For more information about this error, try `rustc --explain E0507`.
-error: could not compile `hello` due to previous error
+error: could not compile `hello` (lib) due to 1 previous error
diff --git a/listings/ch20-web-server/listing-20-22/src/bin/main.rs b/listings/ch20-web-server/listing-20-22/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-22/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-22/src/lib.rs b/listings/ch20-web-server/listing-20-22/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-22/src/main.rs b/listings/ch20-web-server/listing-20-22/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-23/404.html b/listings/ch20-web-server/listing-20-23/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-23/Cargo.lock b/listings/ch20-web-server/listing-20-23/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-23/Cargo.toml b/listings/ch20-web-server/listing-20-23/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-23/hello.html b/listings/ch20-web-server/listing-20-23/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-23/src/bin/main.rs b/listings/ch20-web-server/listing-20-23/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-23/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-23/src/lib.rs b/listings/ch20-web-server/listing-20-23/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-23/src/main.rs b/listings/ch20-web-server/listing-20-23/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-24/404.html b/listings/ch20-web-server/listing-20-24/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-24/Cargo.lock b/listings/ch20-web-server/listing-20-24/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-24/Cargo.toml b/listings/ch20-web-server/listing-20-24/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-24/hello.html b/listings/ch20-web-server/listing-20-24/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-24/src/bin/main.rs b/listings/ch20-web-server/listing-20-24/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/listing-20-24/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-24/src/lib.rs b/listings/ch20-web-server/listing-20-24/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-24/src/main.rs b/listings/ch20-web-server/listing-20-24/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-25/404.html b/listings/ch20-web-server/listing-20-25/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-25/Cargo.lock b/listings/ch20-web-server/listing-20-25/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-25/Cargo.toml b/listings/ch20-web-server/listing-20-25/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-25/hello.html b/listings/ch20-web-server/listing-20-25/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-25/src/bin/main.rs b/listings/ch20-web-server/listing-20-25/src/bin/main.rs
deleted file mode 100755
index 3b314bc..0000000
--- a/listings/ch20-web-server/listing-20-25/src/bin/main.rs
+++ /dev/null
@@ -1,53 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-// ANCHOR: here
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming().take(2) {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-
-    println!("Shutting down.");
-}
-// ANCHOR_END: here
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/listing-20-25/src/lib.rs b/listings/ch20-web-server/listing-20-25/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/listing-20-25/src/main.rs b/listings/ch20-web-server/listing-20-25/src/main.rs
old mode 100755
new mode 100644
index a649ff1..86e8d9e
--- a/listings/ch20-web-server/listing-20-25/src/main.rs
+++ b/listings/ch20-web-server/listing-20-25/src/main.rs
@@ -1,10 +1,11 @@
 use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
 
 // ANCHOR: here
 fn main() {
@@ -24,30 +25,23 @@ fn main() {
 // ANCHOR_END: here
 
 fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
 
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
     };
 
     let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
 
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
 
     stream.write_all(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
 }
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/404.html b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.lock b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.toml b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/hello.html b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/output.txt b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/output.txt
old mode 100755
new mode 100644
index fa337b8..85ebfb8
--- a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/output.txt
+++ b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/output.txt
@@ -7,4 +7,4 @@ error[E0599]: no function or associated item named `new` found for struct `Threa
    |                            ^^^ function or associated item not found in `ThreadPool`
 
 For more information about this error, try `rustc --explain E0599`.
-error: could not compile `hello` due to previous error
+error: could not compile `hello` (bin "hello") due to 1 previous error
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/bin/main.rs b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/bin/main.rs
deleted file mode 100755
index d2b8c88..0000000
--- a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/bin/main.rs
+++ /dev/null
@@ -1,51 +0,0 @@
-// ANCHOR: here
-use hello::ThreadPool;
-// ANCHOR_END: here
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/lib.rs b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/main.rs b/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/404.html b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.lock b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.toml b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/hello.html b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/output.txt b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/output.txt
old mode 100755
new mode 100644
index 44c8f39..6670418
--- a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/output.txt
+++ b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/output.txt
@@ -4,7 +4,7 @@ error[E0599]: no method named `execute` found for struct `ThreadPool` in the cur
   --> src/main.rs:17:14
    |
 17 |         pool.execute(|| {
-   |              ^^^^^^^ method not found in `ThreadPool`
+   |         -----^^^^^^^ method not found in `ThreadPool`
 
 For more information about this error, try `rustc --explain E0599`.
-error: could not compile `hello` due to previous error
+error: could not compile `hello` (bin "hello") due to 1 previous error
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/bin/main.rs b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/lib.rs b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/main.rs b/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/404.html b/listings/ch20-web-server/no-listing-03-define-execute/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/Cargo.lock b/listings/ch20-web-server/no-listing-03-define-execute/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/Cargo.toml b/listings/ch20-web-server/no-listing-03-define-execute/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/hello.html b/listings/ch20-web-server/no-listing-03-define-execute/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/output.txt b/listings/ch20-web-server/no-listing-03-define-execute/output.txt
old mode 100755
new mode 100644
index dc76c43..10d2126
--- a/listings/ch20-web-server/no-listing-03-define-execute/output.txt
+++ b/listings/ch20-web-server/no-listing-03-define-execute/output.txt
@@ -1,3 +1,3 @@
 $ cargo check
     Checking hello v0.1.0 (file:///projects/hello)
-    Finished dev [unoptimized + debuginfo] target(s) in 0.24s
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/src/bin/main.rs b/listings/ch20-web-server/no-listing-03-define-execute/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/no-listing-03-define-execute/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/src/lib.rs b/listings/ch20-web-server/no-listing-03-define-execute/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-03-define-execute/src/main.rs b/listings/ch20-web-server/no-listing-03-define-execute/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/404.html b/listings/ch20-web-server/no-listing-04-update-worker-definition/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.lock b/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.toml b/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/hello.html b/listings/ch20-web-server/no-listing-04-update-worker-definition/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt b/listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt
old mode 100755
new mode 100644
index e4c0eeb..ed97073
--- a/listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt
+++ b/listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt
@@ -7,6 +7,7 @@ error[E0599]: no method named `join` found for enum `Option` in the current scop
    |                           ^^^^ method not found in `Option<JoinHandle<()>>`
    |
 note: the method `join` exists on the type `JoinHandle<()>`
+  --> /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library/std/src/thread/mod.rs:1657:5
 help: consider using `Option::expect` to unwrap the `JoinHandle<()>` value, panicking if the value is an `Option::None`
    |
 52 |             worker.thread.expect("REASON").join().unwrap();
@@ -16,7 +17,7 @@ error[E0308]: mismatched types
   --> src/lib.rs:72:22
    |
 72 |         Worker { id, thread }
-   |                      ^^^^^^ expected enum `Option`, found struct `JoinHandle`
+   |                      ^^^^^^ expected `Option<JoinHandle<()>>`, found `JoinHandle<_>`
    |
    = note: expected enum `Option<JoinHandle<()>>`
             found struct `JoinHandle<_>`
@@ -27,4 +28,4 @@ help: try wrapping the expression in `Some`
 
 Some errors have detailed explanations: E0308, E0599.
 For more information about an error, try `rustc --explain E0308`.
-error: could not compile `hello` due to 2 previous errors
+error: could not compile `hello` (lib) due to 2 previous errors
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/src/bin/main.rs b/listings/ch20-web-server/no-listing-04-update-worker-definition/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/no-listing-04-update-worker-definition/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/src/lib.rs b/listings/ch20-web-server/no-listing-04-update-worker-definition/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-04-update-worker-definition/src/main.rs b/listings/ch20-web-server/no-listing-04-update-worker-definition/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-05-fix-worker-new/404.html b/listings/ch20-web-server/no-listing-05-fix-worker-new/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.lock b/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.toml b/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-05-fix-worker-new/hello.html b/listings/ch20-web-server/no-listing-05-fix-worker-new/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-05-fix-worker-new/src/bin/main.rs b/listings/ch20-web-server/no-listing-05-fix-worker-new/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/no-listing-05-fix-worker-new/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-05-fix-worker-new/src/lib.rs b/listings/ch20-web-server/no-listing-05-fix-worker-new/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-05-fix-worker-new/src/main.rs b/listings/ch20-web-server/no-listing-05-fix-worker-new/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/404.html b/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.lock b/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.toml b/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/hello.html b/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/bin/main.rs b/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/lib.rs b/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/main.rs b/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/main.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-07-define-message-enum/404.html b/listings/ch20-web-server/no-listing-07-define-message-enum/404.html
deleted file mode 100755
index 88d8e91..0000000
--- a/listings/ch20-web-server/no-listing-07-define-message-enum/404.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Hello!</title>
-  </head>
-  <body>
-    <h1>Oops!</h1>
-    <p>Sorry, I don't know what you're asking for.</p>
-  </body>
-</html>
diff --git a/listings/ch20-web-server/no-listing-07-define-message-enum/Cargo.lock b/listings/ch20-web-server/no-listing-07-define-message-enum/Cargo.lock
deleted file mode 100755
index f2d069f..0000000
--- a/listings/ch20-web-server/no-listing-07-define-message-enum/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "hello"
-version = "0.1.0"
-
diff --git a/listings/ch20-web-server/no-listing-07-define-message-enum/Cargo.toml b/listings/ch20-web-server/no-listing-07-define-message-enum/Cargo.toml
deleted file mode 100755
index fe61947..0000000
--- a/listings/ch20-web-server/no-listing-07-define-message-enum/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "hello"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch20-web-server/no-listing-07-define-message-enum/hello.html b/listings/ch20-web-server/no-listing-07-define-message-enum/hello.html
deleted file mode 100755
index fe442d6..0000000
--- a/listings/ch20-web-server/no-listing-07-define-message-enum/hello.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Hello!</title>
-  </head>
-  <body>
-    <h1>Hello!</h1>
-    <p>Hi from Rust</p>
-  </body>
-</html>
diff --git a/listings/ch20-web-server/no-listing-07-define-message-enum/src/bin/main.rs b/listings/ch20-web-server/no-listing-07-define-message-enum/src/bin/main.rs
deleted file mode 100755
index 2078ca9..0000000
--- a/listings/ch20-web-server/no-listing-07-define-message-enum/src/bin/main.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-07-define-message-enum/src/lib.rs b/listings/ch20-web-server/no-listing-07-define-message-enum/src/lib.rs
deleted file mode 100755
index 46fb5f1..0000000
--- a/listings/ch20-web-server/no-listing-07-define-message-enum/src/lib.rs
+++ /dev/null
@@ -1,86 +0,0 @@
-use std::sync::mpsc;
-use std::sync::Arc;
-use std::sync::Mutex;
-use std::thread;
-
-pub struct ThreadPool {
-    workers: Vec<Worker>,
-    sender: mpsc::Sender<Job>,
-}
-
-type Job = Box<dyn FnOnce() + Send + 'static>;
-
-// ANCHOR: here
-enum Message {
-    NewJob(Job),
-    Terminate,
-}
-// ANCHOR_END: here
-
-impl ThreadPool {
-    /// Create a new ThreadPool.
-    ///
-    /// The size is the number of threads in the pool.
-    ///
-    /// # Panics
-    ///
-    /// The `new` function will panic if the size is zero.
-    pub fn new(size: usize) -> ThreadPool {
-        assert!(size > 0);
-
-        let (sender, receiver) = mpsc::channel();
-
-        let receiver = Arc::new(Mutex::new(receiver));
-
-        let mut workers = Vec::with_capacity(size);
-
-        for id in 0..size {
-            workers.push(Worker::new(id, Arc::clone(&receiver)));
-        }
-
-        ThreadPool { workers, sender }
-    }
-
-    pub fn execute<F>(&self, f: F)
-    where
-        F: FnOnce() + Send + 'static,
-    {
-        let job = Box::new(f);
-
-        self.sender.send(job).unwrap();
-    }
-}
-
-impl Drop for ThreadPool {
-    fn drop(&mut self) {
-        for worker in &mut self.workers {
-            println!("Shutting down worker {}", worker.id);
-
-            if let Some(thread) = worker.thread.take() {
-                thread.join().unwrap();
-            }
-        }
-    }
-}
-
-struct Worker {
-    id: usize,
-    thread: Option<thread::JoinHandle<()>>,
-}
-
-impl Worker {
-    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
-        let thread = thread::spawn(move || loop {
-            let job = receiver.lock().unwrap().recv().unwrap();
-
-            println!("Worker {} got a job; executing.", id);
-
-            job();
-        });
-
-        Worker {
-            id,
-            thread: Some(thread),
-        }
-    }
-}
diff --git a/listings/ch20-web-server/no-listing-07-final-code/404.html b/listings/ch20-web-server/no-listing-07-final-code/404.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock b/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml b/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-07-final-code/hello.html b/listings/ch20-web-server/no-listing-07-final-code/hello.html
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs b/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs
old mode 100755
new mode 100644
diff --git a/listings/ch20-web-server/no-listing-07-final-code/src/main.rs b/listings/ch20-web-server/no-listing-07-final-code/src/main.rs
old mode 100755
new mode 100644
index 3161c2e..b6aa046
--- a/listings/ch20-web-server/no-listing-07-final-code/src/main.rs
+++ b/listings/ch20-web-server/no-listing-07-final-code/src/main.rs
@@ -1,10 +1,11 @@
 use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
 
 fn main() {
     let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
@@ -22,30 +23,23 @@ fn main() {
 }
 
 fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
 
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
     };
 
     let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
 
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
 
     stream.write_all(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
 }
diff --git a/listings/ch20-web-server/no-listing-08-final-code/404.html b/listings/ch20-web-server/no-listing-08-final-code/404.html
deleted file mode 100755
index 88d8e91..0000000
--- a/listings/ch20-web-server/no-listing-08-final-code/404.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Hello!</title>
-  </head>
-  <body>
-    <h1>Oops!</h1>
-    <p>Sorry, I don't know what you're asking for.</p>
-  </body>
-</html>
diff --git a/listings/ch20-web-server/no-listing-08-final-code/Cargo.lock b/listings/ch20-web-server/no-listing-08-final-code/Cargo.lock
deleted file mode 100755
index f2d069f..0000000
--- a/listings/ch20-web-server/no-listing-08-final-code/Cargo.lock
+++ /dev/null
@@ -1,6 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "hello"
-version = "0.1.0"
-
diff --git a/listings/ch20-web-server/no-listing-08-final-code/Cargo.toml b/listings/ch20-web-server/no-listing-08-final-code/Cargo.toml
deleted file mode 100755
index fe61947..0000000
--- a/listings/ch20-web-server/no-listing-08-final-code/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "hello"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
diff --git a/listings/ch20-web-server/no-listing-08-final-code/hello.html b/listings/ch20-web-server/no-listing-08-final-code/hello.html
deleted file mode 100755
index fe442d6..0000000
--- a/listings/ch20-web-server/no-listing-08-final-code/hello.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Hello!</title>
-  </head>
-  <body>
-    <h1>Hello!</h1>
-    <p>Hi from Rust</p>
-  </body>
-</html>
diff --git a/listings/ch20-web-server/no-listing-08-final-code/src/bin/main.rs b/listings/ch20-web-server/no-listing-08-final-code/src/bin/main.rs
deleted file mode 100755
index d3f8754..0000000
--- a/listings/ch20-web-server/no-listing-08-final-code/src/bin/main.rs
+++ /dev/null
@@ -1,51 +0,0 @@
-use hello::ThreadPool;
-use std::fs;
-use std::io::prelude::*;
-use std::net::TcpListener;
-use std::net::TcpStream;
-use std::thread;
-use std::time::Duration;
-
-fn main() {
-    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
-    let pool = ThreadPool::new(4);
-
-    for stream in listener.incoming() {
-        let stream = stream.unwrap();
-
-        pool.execute(|| {
-            handle_connection(stream);
-        });
-    }
-
-    println!("Shutting down.");
-}
-
-fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 1024];
-    stream.read(&mut buffer).unwrap();
-
-    let get = b"GET / HTTP/1.1\r\n";
-    let sleep = b"GET /sleep HTTP/1.1\r\n";
-
-    let (status_line, filename) = if buffer.starts_with(get) {
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else if buffer.starts_with(sleep) {
-        thread::sleep(Duration::from_secs(5));
-        ("HTTP/1.1 200 OK", "hello.html")
-    } else {
-        ("HTTP/1.1 404 NOT FOUND", "404.html")
-    };
-
-    let contents = fs::read_to_string(filename).unwrap();
-
-    let response = format!(
-        "{}\r\nContent-Length: {}\r\n\r\n{}",
-        status_line,
-        contents.len(),
-        contents
-    );
-
-    stream.write(response.as_bytes()).unwrap();
-    stream.flush().unwrap();
-}
diff --git a/listings/ch20-web-server/no-listing-08-final-code/src/lib.rs b/listings/ch20-web-server/no-listing-08-final-code/src/lib.rs
deleted file mode 100755
index 68f4263..0000000
--- a/listings/ch20-web-server/no-listing-08-final-code/src/lib.rs
+++ /dev/null
@@ -1,101 +0,0 @@
-use std::sync::mpsc;
-use std::sync::Arc;
-use std::sync::Mutex;
-use std::thread;
-
-pub struct ThreadPool {
-    workers: Vec<Worker>,
-    sender: mpsc::Sender<Message>,
-}
-
-type Job = Box<dyn FnOnce() + Send + 'static>;
-
-enum Message {
-    NewJob(Job),
-    Terminate,
-}
-
-impl ThreadPool {
-    /// Create a new ThreadPool.
-    ///
-    /// The size is the number of threads in the pool.
-    ///
-    /// # Panics
-    ///
-    /// The `new` function will panic if the size is zero.
-    pub fn new(size: usize) -> ThreadPool {
-        assert!(size > 0);
-
-        let (sender, receiver) = mpsc::channel();
-
-        let receiver = Arc::new(Mutex::new(receiver));
-
-        let mut workers = Vec::with_capacity(size);
-
-        for id in 0..size {
-            workers.push(Worker::new(id, Arc::clone(&receiver)));
-        }
-
-        ThreadPool { workers, sender }
-    }
-
-    pub fn execute<F>(&self, f: F)
-    where
-        F: FnOnce() + Send + 'static,
-    {
-        let job = Box::new(f);
-
-        self.sender.send(Message::NewJob(job)).unwrap();
-    }
-}
-
-impl Drop for ThreadPool {
-    fn drop(&mut self) {
-        println!("Sending terminate message to all workers.");
-
-        for _ in &self.workers {
-            self.sender.send(Message::Terminate).unwrap();
-        }
-
-        println!("Shutting down all workers.");
-
-        for worker in &mut self.workers {
-            println!("Shutting down worker {}", worker.id);
-
-            if let Some(thread) = worker.thread.take() {
-                thread.join().unwrap();
-            }
-        }
-    }
-}
-
-struct Worker {
-    id: usize,
-    thread: Option<thread::JoinHandle<()>>,
-}
-
-impl Worker {
-    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Message>>>) -> Worker {
-        let thread = thread::spawn(move || loop {
-            let message = receiver.lock().unwrap().recv().unwrap();
-
-            match message {
-                Message::NewJob(job) => {
-                    println!("Worker {} got a job; executing.", id);
-
-                    job();
-                }
-                Message::Terminate => {
-                    println!("Worker {} was told to terminate.", id);
-
-                    break;
-                }
-            }
-        });
-
-        Worker {
-            id,
-            thread: Some(thread),
-        }
-    }
-}
diff --git a/src/ch09-03-to-panic-or-not-to-panic.md b/src/ch09-03-to-panic-or-not-to-panic.md
index 0fe484c..2bf5e0f 100644
--- a/src/ch09-03-to-panic-or-not-to-panic.md
+++ b/src/ch09-03-to-panic-or-not-to-panic.md
@@ -59,7 +59,7 @@
 相反我们可以创建一个新类型来将验证放入创建其实例的函数中，而不是到处重复这些检查。这样就可以安全地在函数签名中使用新类型并相信它们接收到的值。示例 9-13 中展示了一个定义 `Guess` 类型的方法，只有在 `new` 函数接收到 1 到 100 之间的值时才会创建 `Guess` 的实例：
 
 ```rust
-{{#include ../listings/ch09-error-handling/listing-09-13/src/main.rs:here}}
+{{#include ../listings/ch09-error-handling/listing-09-13/src/lib.rs:here}}
 ```
 
 <span class="caption">示例 9-13：一个 `Guess` 类型，它只在值位于 1 和 100 之间时才继续</span>
diff --git a/src/ch20-01-single-threaded.md b/src/ch20-01-single-threaded.md
index 7013dd3..39f472e 100644
--- a/src/ch20-01-single-threaded.md
+++ b/src/ch20-01-single-threaded.md
@@ -227,7 +227,7 @@ HTTP/1.1 200 OK\r\n\r\n
 <span class="filename">文件名：404.html</span>
 
 ```html
-{{#include ../listings/ch20-web-server/listing-20-08/404.html}}
+{{#include ../listings/ch20-web-server/listing-20-07/404.html}}
 ```
 
 <span class="caption">示例 20-8: 任何 404 响应所返回错误页面内容样例</span>