change 'journal already exists' to 'abandoned transaction found'
Journal already exists is a pretty internal piece of information, which
doesn't necessarily mean much to people who are not familiar with the code.
The new text is a more well-known concept.
adding a
abort: abandoned transaction found - run hg recover!
rolling back interrupted transaction
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions