change replacement character in example, remove extraneous space from suggested change

Author: Jacherr

clippy_lints/src/doc/doc_comment_double_space_linebreak.rs

@@ -42,7 +42,7 @@ fn collect_doc_replacements(attrs: &[Attribute]) -> Vec<(Span, String)> {
                 };
 
                 let len = comment.len();
-                let new_comment = format!("{pre}{} \\", comment[..len - 2].to_owned());
+                let new_comment = format!("{pre}{}\\", &comment[..len - 2]);
                 Some((attr.span, new_comment))
             } else {
                 None

clippy_lints/src/doc/mod.rs

@@ -431,9 +431,9 @@ declare_clippy_lint! {
     /// is clearer in this regard.
     ///
     /// ### Example
-    /// The two dots in this example represent a double space.
+    /// The two replacement dots in this example represent a double space.
     /// ```no_run
-    /// /// This command takes two numbers as inputs and..
+    /// /// This command takes two numbers as inputs and··
     /// /// adds them together, and then returns the result.
     /// fn add(l: i32, r: i32) -> i32 {
     ///     l + r

tests/ui/doc/doc_comment_double_space_linebreak.fixed

@@ -4,7 +4,7 @@
 #![warn(clippy::doc_comment_double_space_linebreak)]
 #![allow(unused)]
 
-//! Should warn on double space linebreaks \
+//! Should warn on double space linebreaks\
 //! in file/module doc comment
 
 /// Should not warn on single-line doc comments
@@ -31,8 +31,8 @@ fn normal_comment() {
      */
 }
 
-/// Should warn when doc comment uses double space \
-/// as a line-break, even when there are multiple \
+/// Should warn when doc comment uses double space\
+/// as a line-break, even when there are multiple\
 /// in a row
 fn double_space_doc_comment() {}
 

tests/ui/doc/doc_comment_double_space_linebreak.stderr

@@ -2,7 +2,7 @@ error: doc comments should use a back-slash (\) instead of a double space to ind
   --> tests/ui/doc/doc_comment_double_space_linebreak.rs:7:1
    |
 LL | //! Should warn on double space linebreaks  
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace this double space with a back-slash: `//! Should warn on double space linebreaks \`
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace this double space with a back-slash: `//! Should warn on double space linebreaks\`
    |
    = note: `-D clippy::doc-comment-double-space-linebreak` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::doc_comment_double_space_linebreak)]`
@@ -16,8 +16,8 @@ LL | | /// as a line-break, even when there are multiple
    |
 help: replace this double space with a back-slash
    |
-LL + /// Should warn when doc comment uses double space \
-LL + /// as a line-break, even when there are multiple \
+LL + /// Should warn when doc comment uses double space\
+LL + /// as a line-break, even when there are multiple\
    |
 
 error: aborting due to 2 previous errors