[issue13086] Update howto/cporting.rst so it talks about Python 3 instead of 3.0

[Larry Hastings]

Larry Hastings <larry at hastings.org> added the comment:

Whoops--I hadn't updated my repo since last year, and someone had already changed to :c:macro:, :c:func:, and :c:type:.  When will I learn!

Attached is a new diff with those changes, against revision @4c6662090870 (on the 2.7 branch).  Also, while I was in there, I made some minor edits to the start of the paragraph about "long/int Unification".  I think it's a slight improvement.

----------
Added file: http://bugs.python.org/file24654/larry.cporting.to.python.3.r3.diff

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13086>
_______________________________________