D6484: states: unified api for checking unfinished states(gsoc-19)

[taapas1128 (Taapas Agrawal)]

taapas1128 added a comment.


  @pulkit okay I will split this into 5 commits.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6484

To: taapas1128, durin42, martinvonz, #hg-reviewers
Cc: pulkit, mjpieters, Kwan, mercurial-devel