commitctx: document _filecommit input and output...
commitctx: document _filecommit input and output
This is the beginning of a larger refactoring/cleanup of the commitctx code to
clarify and augment the logic gathering metadata useful for copy tracing. The
current code is a tad too long and entangled to make such update easy. We start
with easy and small cleanup.
Differential Revision:
https://phab.mercurial-scm.org/D8699