[issue16245] Update html.entities.html5 dictionary and parseentities.py

[Ezio Melotti]

Ezio Melotti added the comment:

I think it's ok to have a separate file rather than patching the existing one (see attached patch).  If the old script is not used anymore it could be removed, otherwise we could just leave it there.

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stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16245>
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