absorb: be more specific when erroring out on merge commit...
absorb: be more specific when erroring out on merge commit
When you have a merge commit checked out and run `hg absorb`, it would
tell you
abort: no mutable changeset to change
That makes it sound like the problem is public commits when isn't
really. Let's be more specific in this case.
There was already a test case that test this, so that now prints the
new message. I added a new test case that shows the old message (when
a public commit is checked out).
Differential Revision:
https://phab.mercurial-scm.org/D6354
