[issue1682] Move Demo/classes/Rat.py to Lib/rational.py and fix it up.

[Jeffrey Yasskin]

Jeffrey Yasskin added the comment:

Whoops, sorry for taking a while to answer. +0 on adding support for
'2.' and '.3', given that they're allowed for float and Decimal. Not +1
because they'll make the regular expression more complicated, and
they're not exactly necessary, but if you want to add them, go ahead.

__________________________________
Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1682>
__________________________________