[docs] [issue11368] Document why xml.etree.ElementTree.Element has no reference to parent

[Georg Brandl]

Changes by Georg Brandl <georg at python.org>:


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title: xml.etree.ElementTree.Element should have a reference to parent -> Document why xml.etree.ElementTree.Element has no reference to parent

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11368>
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