D6502: state: moved cmdutil.STATES and utilities to state.py

[taapas1128 (Taapas Agrawal)]

taapas1128 added inline comments.

INLINE COMMENTS

> martinvonz wrote in state.py:185
> This feels a lot like morestatus functionality and should perhaps have been left in cmdutil.py.

`morestatus` functionality is left in `cmdutil.py` only the place where it checks for unfinished states that is `_morestatus` has been moved here.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6502

To: taapas1128, #hg-reviewers
Cc: martinvonz, mercurial-devel