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

[Georg Brandl]

Georg Brandl <georg at python.org> added the comment:

3.1 because it won't have any effect; it's in security-fix mode.

For 2.7 go ahead.

----------
nosy: +georg.brandl

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