In section 2.4, I believe that the . (dot) in the example closing the
section:
#1=(begin (display #\x) . #1#)
is misleading, because even with a non-circular reference this code would
be an error, such as:
(begin #1=(begin (display #\y)) (begin (display #\x) . #1#))
I suggest to simply remove the . (dot) so that the expression would be
well-formed in the absence of circularity.
--
Daniel Villeneuve
AD OPT, a Kronos Division
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