D2399: stack: return a sorted smartrev by default

[yuja (Yuya Nishihara)]

yuja added inline comments.

INLINE COMMENTS

> stack.py:25
>  
>      revspec = 'reverse(only(%s) and not public() and not ::merge())'
>      revset = revsetlang.formatspec(revspec, rev)

`reverse()` can be removed as well?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2399

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