[docs] [issue24680] typo in documentation, section extending python

[Martin Panter]

Martin Panter added the comment:

Nice and obvious fix, looks like it also applies to Python 2.

----------
nosy: +vadmium
stage:  -> commit review
versions: +Python 2.7, Python 3.4, Python 3.5

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24680>
_______________________________________