[docs] Dangling reference to “User-defined methods”

[Malte Forkel]

Hello,

The English documentation for Python 3.6.2 on the standard type
hierarchy [1] ends with a paragraph titled "Class method objects". It
includes the sentence

   The behaviour of class method objects upon such retrieval is
described above, under “User-defined methods”

That section exists in the documentation for Python 2.7.14rc [2]. In the
documentation for Python 3.6.2, the section has been renamed to
"Instance methods". The term "user-defined method" is still used in that
section and in the paragraph titled "Static method objects", though.

Cheers,
Malte

[1]
https://docs.python.org/3/reference/datamodel.html#the-standard-type-hierarchy
[2]
https://docs.python.org/2/reference/datamodel.html#the-standard-type-hierarchy