Fixed as per Aaron's remark.
* bzrlib/tests/test_conflicts.py:
(TestResolveParentLoop.test_resolve_keeping_mine,
TestResolveParentLoop.test_resolve_taking_theirs): Toghten the
tests as debug showed they were passing with bogus code.
* bzrlib/conflicts.py:
(ParentLoop.take_theirs): Use a TreeTransform to safely rename
multiple files at once.