evolve: add test to demonstrate a bug when no active topic Added test shows that the logic to find the destination for `hg up` in the case when "working directory parent has a topic but wdir has no active topic" is buggy. This will be fixed in next patch.

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)