histedit: restore hex nodeids to be 12 digits long I accidentally switched from 12 digits to 40 digits while making the code py3-compatible. Thanks to Yuya for noticing. Differential Revision: https://phab.mercurial-scm.org/D7200

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil

__path__ = pkgutil.extend_path(__path__, __name__)