angular-ui/bootstrap — pull request #2146 by chrisirhc (2014-05-05 07:30:39+00:00)
Title: fix(alert): correct binding of alert type class

Regression from #1745 as there's a double interpolation expected but
ngClass doesn't support that.

The attribute value of ngClass is only interpolated once and the
interpolated expression is watched.

Fixes #2145