rubinius/rubinius — pull request #1617 by subwindow (2012-03-17 21:47:45+00:00)
Title: Fix for Ruby 1.9 Hash#fetch to raise KeyError when no key exists

Pretty simple fix here.

I have a commit bit, but it's been awhile since I've contributed so I'll take it slow for now. I can merge it myself if that's OK.