[issue19667] Add the "htmlcharrefreplace" error handler

[Berker Peksag]

Changes by Berker Peksag <berker.peksag at gmail.com>:


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nosy: +berker.peksag
versions: +Python 3.6 -Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19667>
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