tests: update output for shorted prompts from Mercurial This makes tests pass again after Mercurial commits f802a75da585 (patch: use a short, fixed-size message for last line of prompt (issue6158), 2019-06-20). CORE-TEST-OUTPUT-UPDATE: f802a75da585

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