changing-files: add a debug command display changed files
The binary output from sidedata is useful to verify the underlying data do not
get corrupted. However having a human readable version is much simpler for
debuging the changed files data itself.
So we add a debug command to dump this information and we use it in the tests.
Differential Revision: https://phab.mercurial-scm.org/D9125
# mercurial.revlogutils -- basic utilities for revlog
#
# Copyright 2019 Pierre-Yves David <pierre-yves.david@octobus.net>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import