get_maintainer: fix perl 5.22/5.24 deprecated/incompatible "\C" use
Perl 5.22 emits a deprecated message when "\C" is used in a regex. Perl 5.24 will disallow it altogether. Fix it by using [A-Z] instead of \C. Signed-off-by: Joe Perches <joe@perches.com> Reported-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu> Tested-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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