Message 163706 - Python tracker

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The problem is that the standard allows some charref to end without a ';', but not all of them.

So both "&Eacuteric" and Éric" will be parsed as "Éric", but only "αcentauri" will result in "αcentauri" -- "&alphacentauri" will be returned unchanged.

I'm now working on #15156 to use this dict in HTMLParser, and detecting the ';'-less entities is not easy.  A possible solution is to keep the names that are accepted without ',' in a separate (private) dict and expose a function like HTMLParser.unescape that implements all the necessary logic.

Regarding ChainMap, the html5 dict should be a superset of the html4 one.