emberjs/ember.js — pull request #2853 by lukemelia (2013-06-18 18:56:11+00:00)
Title: In StateManager, use instanceof check instead old isState attribute. Thi...

In StateManager, use instanceof check instead old isState attribute, which dates to the Sproutcore days. This is potentially breaking, but very unlikely to affect real-world code.

@lukemelia/@stefanpenner