black: blacken scripts
test-check-format.t doesn't appear to detect Python scripts with shebangs.
But my editor which is configured to auto run black on Python files does
and it appears some files are not blackened.
This commit blackens scripts that need it.
# skip-blame reformatting
Differential Revision: https://phab.mercurial-scm.org/D7420
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install::
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing::
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.