r-cubed syntax (nits)

[Jonathan A Rees <JAR@AI.AI.MIT.EDU>]

    Date: 14 Aug 86 13:58:14 PDT (Thu)
    From: willc%tekchips.tek.csnet at CSNET-RELAY.ARPA

    parsimony: 7.1.1: <suffix>: 
    		<digit> <digit>*
    can be written 	<digit>+

OK, will fix.

    ambiguity?: 7.1.3: <case clause> and <cond clause> both allow
    	(else <sequence>)  
    to be any clause, rather than the last clause.  Is this intentional?

I had it this way for a while, and decided that it was unnecessary
clutter in the syntax.  You need to give two rules instead of one for
the syntax of cond (and case), and it looks really bad.  But the fact
that someone noticed & cared is probably enough to indicate that I
should change it back to the more verbose, pedantic form.