compare: workaround unexpected Mercurial behaviour when finding ancestor of null rev ancestor(id(0000000000000000000000000000000000000000),7) == 7 - that caused weird pull request diffs and lots of grief when (accidentally) creating a pull request from the null revision. Add special handling for the case of null revisions.

syntax: glob
*.pyc
*.swp
*.sqlite
*.tox
*.egg-info
*.egg

syntax: regexp
^rcextensions
^build
^dist/
^docs/build/
^docs/_build/
^data$
^sql_dumps/
^\.settings$
^\.project$
^\.pydevproject$
^\.coverage$
^kallithea\.db$
^test\.db$
^Kallithea\.egg-info$
^rc.*\.ini$
^fabfile.py
^\.idea$