D7481: localrepo: recognize trivial "null" queries in `anyrev`

[yuja (Yuya Nishihara)]

yuja added a comment.


  > +        if specs == [b'null']:
  > +            return revset.baseset([nullrev])
  
  This breaks `--config revsetalias.null=<whatever>`. Nobody would care, but
  I don't know why we're so hard to optimize `-r null` query.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7481/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7481

To: marmoute, #hg-reviewers, indygreg
Cc: yuja, mjpieters, mercurial-devel