Martin von Zweigbergk <martinvonz@google.com> [Tue, 20 Mar 2018 22:11:10 -0700] rev 37042
rebase: pass in "user" instead of "ctx" to conclude[memory]node()
This was the only remaining part of the context object that was
needed.
Differential Revision: https://phab.mercurial-scm.org/D2923