Auto merge of rust-lang#6505 - giraffate:fix_style_of_texts_in_map_err_ignore, r=phansch

Fix a style of texts in `map_err_ignore`

It's a small fix of texts.

changelog: none

Author: bors

clippy_lints/src/map_err_ignore.rs

@@ -7,7 +7,7 @@ use rustc_session::{declare_lint_pass, declare_tool_lint};
 declare_clippy_lint! {
     /// **What it does:** Checks for instances of `map_err(|_| Some::Enum)`
     ///
-    /// **Why is this bad?** This map_err throws away the original error rather than allowing the enum to contain and report the cause of the error
+    /// **Why is this bad?** This `map_err` throws away the original error rather than allowing the enum to contain and report the cause of the error
     ///
     /// **Known problems:** None.
     ///
@@ -135,7 +135,7 @@ impl<'tcx> LateLintPass<'tcx> for MapErrIgnore {
                                     body_span,
                                     "`map_err(|_|...` wildcard pattern discards the original error",
                                     None,
-                                    "Consider storing the original error as a source in the new error, or silence this warning using an ignored identifier (`.map_err(|_foo| ...`)",
+                                    "consider storing the original error as a source in the new error, or silence this warning using an ignored identifier (`.map_err(|_foo| ...`)",
                                 );
                             }
                         }

tests/ui/map_err.stderr

@@ -5,7 +5,7 @@ LL |     println!("{:?}", x.map_err(|_| Errors::Ignored));
    |                                ^^^
    |
    = note: `-D clippy::map-err-ignore` implied by `-D warnings`
-   = help: Consider storing the original error as a source in the new error, or silence this warning using an ignored identifier (`.map_err(|_foo| ...`)
+   = help: consider storing the original error as a source in the new error, or silence this warning using an ignored identifier (`.map_err(|_foo| ...`)
 
 error: aborting due to previous error