Move the make_subject() method from OutputBase to Messenger.

Almost no code change. Had to change to .output.prefix_param.

* tools/hook-scripts/mailer/mailer.py:
  (OutputBase.make_subject): moved to ...
  (Messenger.make_subject): ... here. The prefix_param is still back
    in the OutputBase, so tweak the code to fetch it.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1913311 13f79535-47bb-0310-9956-ffa450edef68
1 file changed