ahoward/map — pull request #16 by cookrn (2012-03-28 05:04:18+00:00)
Title: Properly handle calls to Map#keep_if

I tried to handle cases exactly as specified in [http://rubydoc.info/stdlib/core/frames](http://rubydoc.info/stdlib/core/frames) and [https://github.com/rubyspec/rubyspec/blob/master/core/hash/keep_if_spec.rb](https://github.com/rubyspec/rubyspec/blob/master/core/hash/keep_if_spec.rb).

This is tied to [#15](https://github.com/ahoward/map/issues/15)