hgext3rd/__init__.py

merge: introduce a clean_update() for that use-case

I find it hard to understand what value to pass for all the arguments
to `merge.update()`. I would like to introduce functions that are more
specific to each use-case. We already have `graft()`. This patch
introduces a `clean_update()` and uses it in some places to show that
it works.

Differential Revision: https://phab.mercurial-scm.org/D7902

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

__path__ = pkgutil.extend_path(__path__, __name__)