D628: merge: flush any deferred writes before, and after, running any workers

[phillco (Phil Cohen)]

phillco added a comment.


  Ah, right, I forgot about that. I'll do that and send a new rev.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D628

To: phillco, #hg-reviewers
Cc: quark, mercurial-devel