fails:Regexp with character classes doesn't match Unicode No characters with [[:word:]]
fails:Regexp with character classes doesn't matches Unicode marks with [[:alnum:]]
fails:Regexp with character classes doesn't matches Unicode marks with [[:alpha:]]
fails:Regexp with character classes doesn't match Unicode format characters with [[:cntrl:]]
fails:Regexp with character classes doesn't match Unicode private-use characters with [[:cntrl:]]
