Tue, 21 Jul 2009 11:53:41 +0200 if n would be 0, rev_sum would be missing an argument
griff [Tue, 21 Jul 2009 11:53:41 +0200] rev 267
if n would be 0, rev_sum would be missing an argument
(0) -100 -30 -10 -1 +1 +10 +30 +100 +300 tip