YES-OR-NO-P and friend

[JONL at MIT-MC (Jon L White)]

    Date: 1 December 1980 19:11-EST
    From: Alan Bawden <ALAN at MIT-MC>
    y-or-n-p and yes-or-no-p should accept 0 arguments.
Fixed now.  Also reminder that the first agrument, the stream,
is super-optional, in that  (YES-OR-NO-P "..." frob1 frob2 ...)
is entirely equivalent to (YES-OR-NO-P QUERY-IO "..." frob1 frob2 ...)
In MacLISP, the usual standard-output is TYO, and that won't do for a 
stream to YES-OR-NO-P, since it isn't bi-directional.  Thus you have 
your choice of either T, or some bi-directional SFA (which is what
QUERY-IO is).