emberjs/ember.js — pull request #1232 by lcoq (2012-08-03 18:39:14+00:00)
Title: Rakefile :clean remove 'tmp' folder

As @raycohen said, some stashed tests were getting run by `rake test[all]` when the 'tmp' folder is not deleted :
https://github.com/emberjs/ember.js/pull/1117