context: clarify the various mode in the filesremoved method
The previous code was compact but a bit dense. The new proposed code deal with
each mode separately, there are some duplicated lines, but the meaning of each
mode stand out.
One of the benefit it to make it simpler to add further mode in the future.
Differential Revision: https://phab.mercurial-scm.org/D6932
# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)