emberjs/website — pull request #1300 by jayphelps (2014-02-14 22:14:02+00:00)
Title: willRerender was renamed willClearRender long ago

https://github.com/emberjs/ember.js/blob/52be8919216abc125d59df0a96c3f51695d1253e/CHANGELOG.md#ember-100-pre2-october-25-2012

`Replace willRerender with willClearRender`