Martin von Zweigbergk <martinvonz@google.com> [Tue, 04 Feb 2020 10:16:30 -0800] rev 44276
copies: avoid filtering by short-circuit dirstate-only copies earlier
The call to `y.ancestor(x)` triggered repo filtering, which we'd like
to avoid in the simple `hg status --copies` case.
Differential Revision: https://phab.mercurial-scm.org/D8071