graft: never set both parents equal in the dirstate (issue6098)...
graft: never set both parents equal in the dirstate (issue6098)
merge.graft() can set both parents equal in the dirstate when
keepparent=True. We don't seem to set that in core, but the evolve
extension does use it. So I couldn't figure out a way to add a test
for this patch in core.
Differential Revision:
https://phab.mercurial-scm.org/D7549