Experimentation with ansible to show some of its many quirks.
- Multiple inventories
 - until + failed_when
 - regex_replace
 - Templates
 - Referencing a registered variable with do/until
 - Importing, including and tags
 - Async tasks
 - Fact caching
 - Roles handlers and vars
 - Roles handlers more quirks
 - Concurrent known hosts update
 - Hostvars variables
 - Include loops in handlers
 - Error handling
 - Fatal errors
 - No hosts remaining callback