This fails at least when run via tox on current Fedora, flake8
tries to parse the # as a directive and chokes on it.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

Reformat and add max-line-length constraint to flake8 config.

This fixes tests not being added to the source package.

Bumpversion cannot update the release date and trying to remember to
update it manually won't work.