docs: add link to span_lint in diagnostics.rs. (#15065)

Some of the docs in `clippy_utils/src/diagnostics.rs` were missing links
to `span_lint`.

changelog: none

1 files changed, 3 insertions, 3 deletions

diff --git a/clippy_utils/src/diagnostics.rs b/clippy_utils/src/diagnostics.rs
index cd2098a8989..dc240dd067b 100644
--- a/clippy_utils/src/diagnostics.rs
+++ b/clippy_utils/src/diagnostics.rs
@@ -109,7 +109,7 @@ pub fn span_lint<T: LintContext>(cx: &T, lint: &'static Lint, sp: impl Into<Mult
     });
 }
 
-/// Same as `span_lint` but with an extra `help` message.
+/// Same as [`span_lint`] but with an extra `help` message.
 ///
 /// Use this if you want to provide some general help but
 /// can't provide a specific machine applicable suggestion.
@@ -166,7 +166,7 @@ pub fn span_lint_and_help<T: LintContext>(
     });
 }
 
-/// Like `span_lint` but with a `note` section instead of a `help` message.
+/// Like [`span_lint`] but with a `note` section instead of a `help` message.
 ///
 /// The `note` message is presented separately from the main lint message
 /// and is attached to a specific span:
@@ -226,7 +226,7 @@ pub fn span_lint_and_note<T: LintContext>(
     });
 }
 
-/// Like `span_lint` but allows to add notes, help and suggestions using a closure.
+/// Like [`span_lint`] but allows to add notes, help and suggestions using a closure.
 ///
 /// If you need to customize your lint output a lot, use this function.
 /// If you change the signature, remember to update the internal lint `CollapsibleCalls`