[v3] FP printing, take 2

[Jerry Quinn]

Benjamin Kosnik writes:
 > 
 > Jerry, I still do not have a version of this that passes validation. Is
 > this a known issue? 

I've been out of commission for the last week (hellish car repair, parts all
over the garage - not pretty), and before that I didn't have a bootstrapping
compiler.  I think bootstrap is fixed, so I'll look at what's breaking this
weekend.

Jerry