D5243: resolve: fix mark-check when a file was deleted on one side (issue6020)

[spectral (Kyle Lippincott)]

spectral planned changes to this revision.
spectral added a comment.


  (not sure when I'll get to the changes, but removing from Needs Review, sorry I delayed so long doing that)

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5243

To: spectral, #hg-reviewers
Cc: yuja, mercurial-devel