ansible/ansible — pull request #9379 by wfranzini (2014-10-19 17:01:35+00:00)
Title: Preserve backup files

This pull-request introduce two distinct changes:

- an existing backup file is never overwritten;
- the backup extension is the same for all backups in a given run.

Without this change if a file is modified multiple times in the same
execution only the last edit can be rolled back.