angular/angular.js — pull request #6081 by ProLoser (2014-02-01 08:48:26+00:00)
Title: docs(input): Removed invalid statement

$parsers should return values regardless of validity to allow chaining validation.

If a $parser returns `undefined` then sequential parsers will all automatically fail and the validation message feedback will be inaccurate.

See this discussion: https://github.com/angular-ui/ui-utils/pull/149