D3078: revset: use revsymbol() for checking if a symbol is valid

[indygreg (Gregory Szorc)]

indygreg accepted this revision.
indygreg added a comment.
This revision is now accepted and ready to land.


  I'm accepting this because it seems correct. But I'd really appreciate @yuya's review on this because I'm not sure if the change to `revset.matchany()` has unintended consequences.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3078

To: martinvonz, #hg-reviewers, indygreg
Cc: indygreg, mercurial-devel