Auto merge of #5664 - ThibsG:GiveCorrectedCode, r=flip1995

Give corrected code

This PR adds corrected code for doc examples.

I did this in several commits to facilitate review.
Don't hesitate to tell me if I forgot some.
Also, sometimes I felt it was not necessary to give corrected code, but I maybe wrong.

fixes: #4829

changelog: Improve documentation examples across multiple lints.

1 files changed, 8 insertions, 0 deletions

diff --git a/clippy_lints/src/strings.rs b/clippy_lints/src/strings.rs
index 2c51271e312..f84566ef707 100644
--- a/clippy_lints/src/strings.rs
+++ b/clippy_lints/src/strings.rs
@@ -24,6 +24,10 @@ declare_clippy_lint! {
     /// ```rust
     /// let mut x = "Hello".to_owned();
     /// x = x + ", World";
+    ///
+    /// // More readable
+    /// x += ", World";
+    /// x.push_str(", World");
     /// ```
     pub STRING_ADD_ASSIGN,
     pedantic,
@@ -69,7 +73,11 @@ declare_clippy_lint! {
     ///
     /// **Example:**
     /// ```rust
+    /// // Bad
     /// let bs = "a byte string".as_bytes();
+    ///
+    /// // Good
+    /// let bs = b"a byte string";
     /// ```
     pub STRING_LIT_AS_BYTES,
     style,