Groups2009 code: Tests refinements, typo elimination
http://hg.moinmo.in/moin/1.9-groups-dmilajevs/rev/3ffc3eb7f265 Groups2009: @rtype and @return tags were added for the BackendManager.membergroups and the GroupManager.membergroups methods.
http://hg.moinmo.in/moin/1.9-groups-dmilajevs/rev/c198eff7b345 Groups 2009: Docstrings for the groups module tests, typos for tests