Summary:
See <https://discourse.phabricator-community.org/t/diffusion-observed-mercurial-repository-history-broken/825>.
In D18769, I rewrote this from using the `--branch` flag (which is unsafe and does not function on branches named `--config=x.y` and such).
However, this rewrite accidentally changed the result order, which impacted Mercurial commit hisotry lists and graphs. Swap the order of the constraints so we get newest-to-oldest again, as expected.
Test Plan: Viewed a Mercurial repository's history graph, saw sensible chronology after the patch.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18817
a989dd181d