Martin von Zweigbergk <martinvonz@google.com> [Thu, 10 Oct 2019 22:41:50 -0700] rev 43248
widening: trust user to give full "known" set
The new narrow_widen wire protocol command is supposed to return data
for exactly the revisions that the client requested (in order for it
to be strip-free). So we should not add ancestors the client didn't
ask for.
Differential Revision: https://phab.mercurial-scm.org/D7098