[issue6232] Improve test coverage of ElementTree and cElementTree

[Florent Xicluna]

Changes by Florent Xicluna <florent.xicluna at gmail.com>:


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dependencies:  -Update ElementTree with upstream changes
priority:  -> normal
resolution:  -> fixed
stage:  -> committed/rejected
status: open -> closed
superseder:  -> Update ElementTree with upstream changes

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6232>
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