> Filip: Is there a reasons for using a nonlocal count rather than e.g.
> self.count?  Otherwise the test looks good.

Eric, please, could we stop such pointless nitpicking about one's
stylistic preferences? "nonlocal" is as good as any other solution here,
and reviewing is not supposed to be a pedantry contest. There are tons
of serious issues to be solved where your energy would be better spent,
IM(NSH)O.