==================
Bugs fixed
----------
* The properties ``resolvers`` and ``version``, as well as the methods
``set_element_class_lookup()`` and ``makeelement()``, were lost from
``iterparse`` objects in 3.3.0.
* LP1222132: instances of ``XMLSchema``, ``Schematron`` and ``RelaxNG``
did not clear their local ``error_log`` before running a validation.
* LP1238500: lxml.doctestcompare mixed up "expected" and "actual" in
attribute values.
* Some file I/O tests were failing in MS-Windows due to non-portable temp
file usage. Initial patch by Gabi Davar.
* LP910014: duplicate IDs in a document were not reported by DTD validation.
* LP1185332: ``tostring(method="html")`` did not use HTML serialisation
semantics for trailing tail text. Initial patch by Sylvain Viollon.
* LP1281139: ``.attrib`` value of Comments lost its mutation methods
in 3.3.0. Even though it is empty and immutable, it should still
provide the same interface as that returned for Elements.