D6607: merge: disallow merge abort in case of an unfinished operation(issue6160)

[taapas1128 (Taapas Agrawal)]

taapas1128 added a comment.


  okay I will create that in `cmdutil.py`.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D6607/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D6607

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