emberjs/ember.js — pull request #9670 by ebryn (2014-11-22 01:35:53+00:00)
Title: Avoid calling extend in the collection helper

Punted on getting any fancier for now. Ultimately we'd ideally be able to pass the factory into `View#createChildView` and the `Factory#create` method would handle merging all the attributes in.

@rwjblue @stefanpenner