[docs] [issue29520] Documentation uses deprecated "defindex.html" Sphinx template

[INADA Naoki]

INADA Naoki added the comment:

I can reproduce it with Sphinx 1.5.2.
Additonally, "None" is shown at top.

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nosy: +inada.naoki
Added file: http://bugs.python.org/file46648/sphinx-1.5-pydoc.png

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<http://bugs.python.org/issue29520>
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