D5064: style: run black on a subset of mercurial

[av6 (Anton Shestakov)]

av6 added a comment.


  I look at the changes and see nitpicks at best. On the one hand, black proved better than any linter that we can already write consistent code. On the other, if black were a linter... I'd switch to flake8, which at least is configurable <https://www.mercurial-scm.org/repo/evolve/file/tip/setup.cfg#l1>.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5064

To: mjpieters, indygreg, durin42, #hg-reviewers
Cc: av6, mercurial-devel