[plt-scheme] scribble #<void>

From: Jon Rafkind (rafkind at cs.utah.edu)
Date: Wed May 27 18:40:56 EDT 2009

If I put some scheme code in a .scrbl file I end up with #<void>'s 
printed in the result (I was hacking 
scribblings/reference/file-ports.scrbl). How can I avoid printing #<void> ?

I have something like

(define ...) doesn't seem to print anything so I could just wrap all 
expressions with a (define xxx ...).

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