[Nickle] sign error in subtraction of rationals

[Bart Massey]

Dang, beat me to it.

I'm working on getting a test suite lined up now.

	Bart

In message <E18K727-0002tT-00@localhost> you wrote:
> 
> Around 15 o'clock on Dec 5, Carl Worth wrote:
> 
> > >  -0.4 - -0.2
> >  	0.2
> 
> Sorry for the delay, sushi intervened.  Quite a surprising finding, but it 
> really was that broken.
> 
> -keith
> 
> 
> 
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