thoughtbot/shoulda-matchers — pull request #505 by mcmire (2014-04-20 23:24:27+00:00)
Title: Use Doublespeak for delegate_method matcher

Also:

* Make it possible to negate the matcher, and use negation in tests
rather than !matches?
* If the matcher fails, add more information to the failure message as
to what was actually called on the target object