changelog pagination with branch filtering now uses common logic that non branch filtered version. - introduced CollectionGenerator object as a helper for achieving abstraction layer on top of filtered results
"""Various utilities to work with Python < 2.7.Those utilities may be deleted once ``vcs`` stops support for older Pythonversions."""importsysifsys.version_info>=(2,7):unittest=__import__('unittest')else:unittest=__import__('unittest2')