Taken from https://github.com/checkstyle/checkstyle/issues/11566 commit: https://github.com/checkstyle/checkstyle/commit/009cffaae0f1bd79f5c0084f5354f45ed391e346 we need to revert suppression of RegExpDuplicateCharacterInClass or explain why they should be permanent.
Taken from #11566
commit: 009cffa
we need to revert suppression of RegExpDuplicateCharacterInClass or explain why they should be permanent.