- Fixed regression from 0.9.10 prior to release due to :ticket:`3349`

- Fixed regression from 0.9.10 prior to release due to :ticket:`3349`
where the check for query state on :meth:`.Query.update` or
:meth:`.Query.delete` compared the empty tuple to itself using ``is``,
which fails on Pypy to produce ``True`` in this case; this would
erronously emit a warning in 0.9 and raise an exception in 1.0.
fixes #3405

(cherry picked from commit 681276b5b4ae48924c85a1c26af3f9bde3d77b5f)