[issue12345] Add math.tau

[Mark Dickinson]

Mark Dickinson added the comment:

The unification of tau2.diff and tau3.diff LGTM; thanks, Lisa!

My commit bit is broken at the moment; anyone in a position to apply those patches?

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12345>
_______________________________________