Comment 13 for bug 666297

Crap! That should be::

  >>> from kar.utilities.rename_user import rename_user
  >>> root['profiles']['kuhlermckeown'] = object()
  >>> rename_user(root, 'kuhlermckeown', 'kuhler-mckeown', merge=True)
  >>> assert 'kuhlermckeown' not in root['profiles']
  >>> import transaction; transaction.commit()