3) In the *vc-change-log* buffer, type D (log-view-diff-changeset) to view
the changeset for that single revision.
Emacs runs "hg diff --git -r 46768 -r 46769", but this does not show
the expected contents of the changeset, as the previous revision was
on a different named branch. Instead this shows the (large) diff between
the two branches. The line counts illustrate this:
# hg diff -r 46768 -r 46769 | wc -l ## Diff between branches
102276
# hg diff -c 46769 | wc -l ## Changeset diff
295
# hg log -p -r 46769 | wc -l ## Changeset diff + hg metadata
302
The second and third commands give the expected output.
Can log-view-diff-changeset be changed to deal with this case more
gracefully ?
VC assumes you can get the changeset by running
"hg diff -r <something> -r 46769". Is there a <something> that would
give the right answer? Ideally this <something> should be computable
from "46769".