* feature: module dpkg_divert + tests
* try to skip non-deb linux distrib
* use collection namespace in EXAMPLES
* skip unsupported OS/distrib in tasks instead
* tests: remove unskipped distribs
* apply changes suggested by Andersson007
* Remove ANSIBLE_METADATA (no more needed).
* Normalize docstrings (capitalize descriptions, fix styling, use yes/no
booleans).
* fix descriptions
* update DOCUMENTATION
* Drop field 'version_added' (no more needed).
* Add a note about check_mode support.
* use list comprehension
* support diff mode
* Move 'before'/'after' dicts into 'diff' dictionary.
* Set 'diversion' as the actual state (or the state that would be
reached, when in check mode).
* Always return 'diversion' on handled exits (exit_json & fail_json).
* enable 'diff' mode in tests, add missing 'become'
