[docs] Set documentation bug

[Davide Del Vento]

Hi,
I'd like to suggest a little but IMO important improvement for this
page: http://docs.python.org/library/sets.html

The sentence "Deprecated since version 2.6: The built-in set/frozenset
types replace this module." should link to
http://docs.python.org/library/stdtypes.html#set etc.

The following patch would do the job.

Thanks and Regards,
Davide

--- sets.txt    2011-02-11 17:15:05.833691409 +0000
+++ sets.txt.orig       2011-02-11 17:14:30.282993805 +0000
@@ -14,7 +14,7 @@
.. versionadded:: 2.3

.. deprecated:: 2.6
-   The built-in :class:`set`\/\ :class:`frozenset` types replace this module.
+   The built-in ``set``/``frozenset`` types replace this module.

The :mod:`sets` module provides classes for constructing and manipulating
unordered collections of unique elements.  Common uses include membership