[net.lang.prolog] Corrected grammar-rule preprocessor for PDP-11 Prolog

ok@edai.UUCP (06/16/83)

The source code can be found in the net.sources newsitem with
the same title as this one.  The grammar-rule preprocessor in
PDP-11 Prolog contains a bug.  The code in the Clocksin & Mellish
book is based on it, and contains the same bug.  My gconsult also
defines some predicates to enhance compatability with Dec-10
Prolog.  If you are using any Prolog other than Dec-10 or C
Prolog, you will probably find this useful.

	Did the meta-logical utilities arrive?
	Type-checker coming soon!