revlog: prepare pure parser for being overloaded
The current class uses module-level variables which don't allow for reusing the
current logic for a slightly different revlog version.
Differential Revision: https://phab.mercurial-scm.org/D9903
revlog: use a less probable revlog version for backwards compatibility
This allows us to define a usable v2.
Differential Revision: https://phab.mercurial-scm.org/D9902
Pierre-Yves David <pierre-yves.david@octobus.net> [Wed, 27 Jan 2021 15:06:02 +0100] rev 46477
clang-format: show required version in skip message
This will help people to configure their black
Differential Revision: https://phab.mercurial-scm.org/D9890