emberjs/ember.js — pull request #9759 by rwjblue (2014-11-28 13:37:56+00:00)
Title: Use HTMLBars plugin system to transform non-standard templates.

Requires https://github.com/tildeio/htmlbars/pull/168.

* Enables removal of custom `preprocessArguments` code for `{{each}}` and `{{with}}`.
* Paves the way for a more automatic streamification of arguments.
* Dramatically simplifies `each`/`with` helper code.