D1285: repoview: add a new attribute _visibilityexceptions and related API

[yuja (Yuya Nishihara)]

yuja added inline comments.

INLINE COMMENTS

> quark wrote in localrepo.py:575
> I guess `hg log -r HASH --hidden` would go through this code path so `pass` makes sense.

Maybe. My concern was `getvisibilityexceptions()` "seemed" not
working correctly in that case. I know unfiltered repo has no
exception, but I would expect `get` will return `add`-ed.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1285

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