tests: port test-walkrepo.py to Python 3
# skip-blame just b prefixes, nothing interesting
Differential Revision: https://phab.mercurial-scm.org/D3473
FROM debian:__CODENAME__
RUN apt-get update && apt-get install -y \
build-essential \
debhelper \
devscripts \
dh-python \
less \
python \
python-all-dev \
python-docutils \
unzip \
zip