tests/test-push-warn.out

Add code coverage to the python version of run-tests (inc. annotation)
Also include a minor work-around to coverage.py to avoid errors about /<string>

pushing to ../a
searching for changes
abort: unsynced remote changes!
(did you forget to sync? use push -f to force)
pulling from ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
(run 'hg heads' to see heads, 'hg merge' to merge)
pushing to ../a
searching for changes
abort: push creates new remote branches!
(did you forget to merge? use push -f to force)
pushing to ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 1 changes to 1 files
adding foo
merging foo
pushing to ../c
searching for changes
abort: push creates new remote branches!
(did you forget to merge? use push -f to force)
pushing to ../c
searching for changes
no changes found
pushing to ../c
searching for changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 2 changes to 1 files (+2 heads)
pushing to ../c
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files