In the test we simply removed the update-ref todo but didn't make any other
changes to the todos. This should really have kept everything the way it was,
including the other branch head. The fact that the star was gone was really
because of the bug that we are going to fix later in the branch.
Change the test so that it also makes a change before the update-ref todo; this
way we test that the star is gone because we deleted the update-ref, not because
of the bug.
To guard against the bug, we add another assertion for the branches view to test
that both branches are still there. This currently fails.
