[ticket/11509] Three dots means sym. difference, but we only want new commits.

PHPBB3-11509
[ticket/11509] Output which commit is being inspected.

PHPBB3-11509
[ticket/11509] Exit with the expected (non-zero) exit status on failure.

PHPBB3-11509
Merge remote-tracking branch 'bantu/ticket/11509' into develop-olympus

* bantu/ticket/11509:
  [ticket/11509] Exit with the expected (non-zero) exit status on failure.
  [ticket/11509] Output which commit is being inspected.
  [ticket/11509] Three dots means sym. difference, but we only want new commits.