angular/angular.js — pull request #9458 by matsko (2014-10-07 08:31:28+00:00)
Title: fix($animate): ensure that class-based animations only consider the most recent DOM operations

Prior to this fix $animate would maintain a count of each time a class was
added and removed within $animate. With this fix, $animate instead only cares
about the class times that the classes were added and/or removed.

Closes #8946