[R6RS] Naming for fixnum / flonum ops

[dyb at cs.indiana.edu]

> May I suggest switching from prefix to suffix (quotientfx or quotient:fx
> instead of fxquotient fx:quotient). I prefer suffix because they imply
> more efficient documentation indexes... 

Just my two cents: I prefer a prefix.  One might just as well prefer
that the fx operators are grouped together in the index.  In any case,
I don't care much for this kind of rationale, since the documentation
author can always put in additional index entries.

Kent