🚀 go-pugleaf

I find that I have inadvertantly misrepresented BIMprolog.
(Though I _did_ warn you that I was using an old manual.)

Yesterday I was at a demo of BIMprolog put on by Bert Shure and the
Prolog Forum, and had the opportunity of studying a more recent BIM
manual (printed on thick blue paper in the layout of a Sun manual).
According to this newer manual, BIMprolog parses (if->then;else)
as ((if->then);else), just like DEC-10 Prolog and C Prolog.
Also, I had misunderstood mark(_) and cut(_): the system supplies
the integer argument, not the programmer.

I trust Bart Demoen will forgive me if I don't mention BIMprolog
in the future:  I don't want to be caught looking silly again.
To quote "101 Zen Stories" #77:
	A person may appear a fool and yet not be one.
	He may only be guarding his wisdom carefully.