[Doc-SIG] __self__ on built-in functions

[Роман Донченко]

Hello,

The language reference for Python 3.2 (and the development version, as  
well), says this in section 3.2:

~
Built-in functions

A built-in function object is a wrapper around a C function. Examples of  
built-in functions are len() and math.sin() (math is a standard built-in  
module). <...> Special read-only attributes: <...> __self__ is set to None  
(but see the next item) <...>.
~

Now I don't know whether it's a bug in Python or in the docs, but that  
doesn't seem to be the case:

ActivePython 3.2.2.3 (ActiveState Software Inc.) based on
Python 3.2.2 (default, Sep  8 2011, 10:55:13) [MSC v.1500 64 bit (AMD64)]  
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> len.__self__
<module 'builtins' (built-in)>
>>> open.__self__
<module 'io' (built-in)>
>>> import math
>>> math.sin.__self__
<module 'math' (built-in)>

Thoughts?

Roman.