[PATCH v3] checkpatch: warn about novice phrases in commit messages

["Ignacio Peña" <ignacio.pena87@gmail.com>]

Add detection for common phrases that make patches appear less
confident. These phrases are often used by newcomers and can make
their contributions seem less professional or uncertain.

The regex uses qr{} syntax as suggested for better readability and
potential pre-compilation benefits.

Examples of detected phrases:
- 'please apply/merge/consider/review'
- 'hope this helps'
- 'my first patch/contribution'
- 'newbie/beginner here'
- 'not sure if (this is) correct'
- 'sorry if/for'

This helps newcomers learn the expected communication style in
kernel development, where direct and confident communication is
preferred.

Link: https://docs.kernel.org/process/submitting-patches.html#describe-your-changes
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Ignacio Peña <ignacio.pena87@gmail.com>
---
Changes in v3:
- Use qr{} syntax instead of // for the regex (Joe Perches)
- Remove comment about the suggestion (Joe Perches)
- Drop the SHA enforcement patch based on maintainer feedback

Changes in v2:
- Combined multiple regexes into single expression with non-capturing groups
- Changed warning message from 'professional' to 'confident'
---
 scripts/checkpatch.pl | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e722dd6fa..ac270f35b 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3266,6 +3266,14 @@ sub process {
 			     "A patch subject line should describe the change not the tool that found it\n" . $herecurr);
 		}
 
+# Check for novice phrases in commit message
+		if ($in_commit_log && !$non_utf8_charset) {
+			if ($line =~ qr{\b(?:please\s+(?:apply|merge|consider|review)|hope\s+this\s+helps|my\s+first\s+(?:patch|contribution)|(?:newbie|beginner)\s+here|not\s+sure\s+if\s+(?:this\s+is\s+)?correct|sorry\s+(?:if|for))\b}i) {
+				WARN("COMMIT_MESSAGE_NOVICE",
+				     "Avoid apologetic or uncertain language - be direct and confident\n" . $herecurr);
+			}
+		}
+
 # Check for Gerrit Change-Ids not in any patch context
 		if ($realfile eq '' && !$has_patch_separator && $line =~ /^\s*change-id:/i) {
 			if (ERROR("GERRIT_CHANGE_ID",
-- 
2.50.1