D726: uncommit: rename the flag 'empty' to 'keep' which retains empty changeset

[krbullock (Kevin Bullock)]

krbullock accepted this revision as: krbullock.
krbullock added a comment.


  LGTM, but leaving it for others to review because I know this was a subject of IRC discussion recently.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D726

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