formatting: blacken the codebase This is using my patch to black (https://github.com/psf/black/pull/826) so we don't un-wrap collection literals. Done with: hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S # skip-blame mass-reformatting only # no-check-commit reformats foo_bar functions Differential Revision: https://phab.mercurial-scm.org/D6971

style: run a patched black on a subset of mercurial This applied black to the 20 smallest files in mercurial/: ls -S1 mercurial/*.py | tail -n20 | xargs black --skip-string-normalization Note that a few files failed to format, presumably due to a bug in my patch. The intent is to be able to compare results to D5064 with https://github.com/python/black/pull/826 applied to black. I skipped string normalization on this patch for clarity - in reality I think we'd want one pass without string normalization, followed by another to normalize strings (which is basically replacing ' with " globally.) # skip-blame mass-reformatting only Differential Revision: https://phab.mercurial-scm.org/D6342