Everything to the right of the assignment in the following expression should be treated as a regexp. It seems to be confused by an escaped right bracket and a slash in a character class.
re = /[\]/qwerty]/
Pygments seems to be handling it fine.
Looks like it doesn't need to be a ], just any escaped character within a character class, followed by a /.
Use a region for regex character classes
This should fix #101 and also fixes heregexes breaking with [///]
This should finally be fixed w/ 7130a14