thoughtbot/shoulda-matchers — pull request #155 by tsigo (2012-09-19 02:33:21+00:00)
Title: Add "is_within" method to EnsureLengthOfMatcher

This seems like something you guys would have added already if you
actually wanted it, so apologies if that's the case.

Otherwise, this seems like it would be a handy shortcut to calling both
`is_at_least` and `is_at_most`.