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, 5 insertions, 1 deletions

diff --git a/clippy_lints/src/format.rs b/clippy_lints/src/format.rs
index 5b092526ce4..1530538aa7d 100644
--- a/clippy_lints/src/format.rs
+++ b/clippy_lints/src/format.rs
@@ -25,9 +25,13 @@ declare_clippy_lint! {
     ///
     /// **Examples:**
     /// ```rust
+    ///
+    /// // Bad
     /// # let foo = "foo";
-    /// format!("foo");
     /// format!("{}", foo);
+    ///
+    /// // Good
+    /// format!("foo");
     /// ```
     pub USELESS_FORMAT,
     complexity,