ansible/ansible — pull request #1530 by dagwieers (2012-11-06 13:34:47+00:00)
Title: Improve the mail callback to support differing failures

Since callbacks are called with different argument-types, we have to be careful. We support two different distinct cases:

- The error information can be in one ore more of the following items (msg, stderr or stdout)
- The res/msg value returned can be a string or a list