proto.icn: Program to show Icon syntactic forms

   This program doesn't "do" anything.  It just contains an example of
every syntactic form in Version 7 of Icon (or close to it).  It might
be useful for checking programs that process Icon programs.  Note, however,
that it does not contain many combinations of different syntactic forms.
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Program note:

   This program is divided into procedures to avoid overflow with
default values for Icon's translator and linker.