Shouldn't - in theory - [^\S \n] match the same set as your \s(?<![ \n])  (\S being complementary to \s)?

Just tried it with my perl (v5.12.2), and [^\S \n] doesn't match \x{0085} and \x{00A0}, while \s(?<![ \n]) does.  Now I'm wondering why...

BTW, \v (\x{000B}) isn't matched in either case, here.

In reply to Re^2: regexp: removing extra whitespace by Eliya
in thread regexp: removing extra whitespace by perlmax

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