Fix deprecation warning in Python 3.4

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I get these warnings when using HTMLDecoder:

/home/larsoner/.local/lib/python3.4/site-packages/pyglet/text/__init__.py:144: 
DeprecationWarning: The value of convert_charrefs will become True in 3.5. You 
are encouraged to set the value explicitly.
  return html.HTMLDecoder()

This change initializes the super classes, expliciting setting 
"convert_charrefs=True" as recommended by the warning:

https://code.google.com/r/larsonericd-clone/source/detail?r=f4fd5f054e87508ed183
7b839afa3df82c1579b7&name=fixpulse

Original issue reported on code.google.com by larson.e...@gmail.com on 7 May 2014 at 6:23

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Original comment by useboxnet on 8 May 2014 at 5:59

• Changed state: Accepted
• Added labels: Python-3.3, Type-Enhancement

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I'm not sure about this patch, HTMLParser.__Init__ doesn't have parameters in 
python 2.

Original comment by useboxnet on 16 Jul 2014 at 5:18

• Changed state: Blocked

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I started looking into using `inspect.getargspec`, but on py3k we'd need to use 
`inspect.getfullargspec` which doesn't exist on python2...

It should work just to triage based on `sys.version[0] == '3'`. WDYT?

Original comment by larson.e...@gmail.com on 16 Jul 2014 at 5:26

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Well, we have this module already:

https://code.google.com/p/pyglet/source/browse/pyglet/compat.py

Original comment by useboxnet on 16 Jul 2014 at 6:10

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One solution would then be to wrap it like this for Python3:

HTMLParser_init = partial(HTMLParser.HTMLParser.__init__, convert_charrefs=True)

and for Python2:

HTMLParser_init = HTMLParser.HTMLParser.__init__

And then have `pyglet.text.formats` import it from `compat.py`.

Original comment by larson.e...@gmail.com on 16 Jul 2014 at 6:17

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Sounds OK. I don't have a strong opinion besides using the compat module :)

Thanks!

Original comment by useboxnet on 16 Jul 2014 at 6:29