[racket] slides unit testing

From: Sam Tobin-Hochstadt (samth at ccs.neu.edu)
Date: Wed Jul 3 15:22:48 EDT 2013

On Wed, Jul 3, 2013 at 3:04 PM, John Clements <clements at brinckerhoff.org> wrote:
> It depends on a .png file, which I'll send you separately.

If you check out the git repository corresponding to that gist, you
can add the .png file.


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