diff: add experimental support for "merge diffs"...
diff: add experimental support for "merge diffs"
The way this works is it re-runs the merge and "stores" conflicts, and then
diffs against the conflicted result. In a normal merge, you should only see
diffs against conflicted regions or in cases where there was a semantic
conflict but not a textual one. This makes it easier to detect "evil merges"
that contain substantial new work embedded in the merge commit.
Differential Revision:
https://phab.mercurial-scm.org/D8504
