twitter/twitter-text-rb — pull request #9 by cwest (2011-10-10 13:12:42+00:00)
Title: All spec and conformance tests pass (ruby-1.9.2-p290).

POSIX regular expression character classes in Ruby
encompass non-ASCII characters, which leads to some
unexpected matches in the URL parsing library. Using
the standard POSIX definitions of these character
classes makes the tests pass. More information here on
the translations used:

http://en.wikipedia.org/wiki/Regular_expression#POSIX_character_classes