hgext/__init__.py

revlog: simplify "partial read" error message

We are about to reuse this message in more places and the current handling is
pretty hard to read. So we eat two pie with one stone and clean up this.

Differential Revision: https://phab.mercurial-scm.org/D10784

from __future__ import absolute_import
import pkgutil

__path__ = pkgutil.extend_path(__path__, __name__)