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[racket-dev] printing images in REPL

From: Shriram Krishnamurthi (sk at cs.brown.edu)
Date: Thu Aug 26 13:55:39 EDT 2010		 
What is the #lang magic that makes

> (get-image-from-web "http://racket-lang.org/logo.png")
(instantiate (class ...) ...)

show the image rather than just its constructor?

Shriram
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