ansible/ansible — pull request #8052 by darkk (2014-07-07 15:10:31+00:00)
Title: assert: add optional `msg` argument

Sample playbook when it may be useful:
```
- uri: return_content=yes url={{ api_base }}/action/{{ inventory_hostname }}
register: output
- assert:
msg: '{{ output.json | to_nice_json }}'
that:
- output.json.foo != "bar"
- output.json.boo == 42
```