angular/angular.js — pull request #8322 by dbwhddn10 (2014-07-24 15:50:53+00:00)
Title: fix(rootScope.js): edit $watch parameter comment

i think $watch listener params comment is wrong ( string value is not correct)

i think $watch listener params is same as $watchgroup listener and only function value

https://github.com/angular/angular.js/blob/master/src/ng/rootScope.js#L349-351