[docs] suggestion about Python 3.2.3 online documentation about regular expressions

[Winston Chuen-Shih Yang]

See the following page:

     http://docs.python.org/py3k/library/re.html

     6.2.3. Regular Expression Objects

     regex.search
     regex.match
     regex.split
     :
     :

Suggestion: change "regex" to "pattern".

Reason 1: The object is a "Pattern" (_sre.SRE_Pattern).

Reason 2: People might confuse "regex" with "re", which is the name of 
the module.

Reason 3: People might think that there is a "regex" class somewhere. 
(Is there?)

Winston