[racket] online check syntax error display tweak

From: Grant Rettke (grettke at acm.org)
Date: Fri Sep 9 10:43:01 EDT 2011

On Fri, Sep 9, 2011 at 9:34 AM, Robby Findler
<robby at eecs.northwestern.edu> wrote:
> Thanks!

If it is of any value I can send a simpler screenshot; I just kludged
that one up.

> Why is the string yellow?

That is my custom setting :).

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