D451: revset: remove order information from tree

[quark (Jun Wu)]

quark added inline comments.

INLINE COMMENTS

> quark wrote in revset.py:893
> In this case, `y` is expected to completely redefine the order. So `y`'s `subset`'s order does not matter.

By "y's subset", I mean "getset(repo, subset, x, xorder)".

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D451

To: quark, #hg-reviewers
Cc: yuja, mercurial-devel