[PATCH v3 3/3] checkpatch.pl: --fix support for `//` comments rust private items

[Arnaud Lecomte <contact@arnaud-lcm.com>]

Extend the Rust private item documentation checker (added in the previous
patch) to support automatic fixes when the `--fix` option is enabled.

Link: https://lore.kernel.org/all/20250419222505.9009-1-contact@arnaud-lcm.com/
Signed-off-by: Arnaud Lecomte <contact@arnaud-lcm.com>
---
 scripts/checkpatch.pl | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index eb564a119d68..ad3ae5fdd830 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3053,9 +3053,11 @@ sub process {
 					next if $comment =~ m@^\s*(?:TODO|FIXME|XXX|NOTE|HACK|SAFETY):?@i;
 					next if $comment =~ m@^\s*[[:punct:]]{2,}@;
 					my $line_issue = $i - 3;
-					WARN("POSSIBLE_MISSING_RUST_DOC",
+					if (WARN("POSSIBLE_MISSING_RUST_DOC",
 						"Consider using `///` if the comment was intended as documentation (line $line_issue).\n" .
-					"$here\n$comment_line");
+					"$here\n$comment_line") && $fix) {
+						$fixed[$i - 1] =~ s/^\+(\/\/)/+$1\//;
+					}
 				}
 			}
 		}
-- 
2.43.0