D953: merge: use filemerge failure handler in post-filemerge checks checks

[mbthomas (Mark Thomas)]

mbthomas accepted this revision.
mbthomas added a comment.


  Stack all looks good to me.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D953

To: ryanmce, #hg-reviewers, mbthomas
Cc: mbthomas, mercurial-devel