[PATCH v2] checkpatch: use utf-8 match for spell checking

[Antonio Borneo]

The current code that checks for misspelling verifies, in a more
complex regex, if $rawline matches [^\w]($misspellings)[^\w]

Being $rawline a byte-string, a utf-8 character in $rawline can
match the non-word-char [^\w].
E.g.:
	./scripts/checkpatch.pl --git 81c2f059ab9
	WARNING: 'ment' may be misspelled - perhaps 'meant'?
	#36: FILE: MAINTAINERS:14360:
	+M:     Clément Léger <clement.leger@xxxxxxxxxxx>
	            ^^^^

Use a utf-8 version of $rawline for spell checking.

Signed-off-by: Antonio Borneo <antonio.borneo@xxxxxxxxxxx>
Reported-by: Clément Le Goffic <clement.legoffic@xxxxxxxxxxx>
---
Changes in v2:
- use $rawline_utf8 also in the while-loop's body;
- fix path of checkpatch in the commit message.
---
 scripts/checkpatch.pl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 25fdb7fda112..2d122d232c6d 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3477,9 +3477,10 @@ sub process {
 # Check for various typo / spelling mistakes
 		if (defined($misspellings) &&
 		    ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
-			while ($rawline =~ /(?:^|[^\w\-'`])($misspellings)(?:[^\w\-'`]|$)/gi) {
+			my $rawline_utf8 = decode("utf8", $rawline);
+			while ($rawline_utf8 =~ /(?:^|[^\w\-'`])($misspellings)(?:[^\w\-'`]|$)/gi) {
 				my $typo = $1;
-				my $blank = copy_spacing($rawline);
+				my $blank = copy_spacing($rawline_utf8);
 				my $ptr = substr($blank, 0, $-[1]) . "^" x length($typo);
 				my $hereptr = "$hereline$ptr\n";
 				my $typo_fix = $spelling_fix{lc($typo)};

base-commit: b85ea95d086471afb4ad062012a4d73cd328fa86
-- 
2.42.0