Martin von Zweigbergk <martinvonz@google.com> [Wed, 16 Dec 2020 22:16:05 -0800] rev 46132
extdiff: pass contexts instead of nodeids into diffrevs()
This just avoids some unnecessary lookups.
Differential Revision: https://phab.mercurial-scm.org/D9622
Martin von Zweigbergk <martinvonz@google.com> [Wed, 16 Dec 2020 21:40:27 -0800] rev 46131
tests: remove undefined (empty) $opt from test-extdiff.t
It's been undefined for a long time (at least since .t unification).
Differential Revision: https://phab.mercurial-scm.org/D9621