hgext/__init__.py

mergestate: extract a base class to be shared by future memmergestate

This extracts a new base class from `mergestate` and leaves all the
vfs-touching code in `mergestate`.

Differential Revision: https://phab.mercurial-scm.org/D9039

from __future__ import absolute_import
import pkgutil

__path__ = pkgutil.extend_path(__path__, __name__)