angular/angular.js — pull request #4240 by chrisrhoden (2013-10-02 23:16:42+00:00)
Title: feature(ngEnabled): define ngEnabled directive as negation of ngDisabled

Provide a negated form of the `ngDisabled` directive as `ngEnabled` in
the same vein as the `ngHide`/`ngShow` pair. Allow for slightly clearer
templates by avoiding double negatives, as in:

Closes #1252