pullrequests: fix 'upgrade' from revision to branch when creating PR This will do that the default title for the PR created from a non-head revision will contain a short hash instead a long. org_ref_type was set to 'branch' while org_ref_name remained the full hash. h.short_ref would thus not truncate. Instead, we keep the org_ref_type as 'rev' while storing the branch name in the database.

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.