[racket] Can `raco test ...' return non 0 values?

From: Diogo F. S. Ramos (diogofsr at gmail.com)
Date: Wed Mar 20 12:40:46 EDT 2013

`raco test ...' seems to return 0 whenever a test fails or not.

Is it possible to make it return non 0 values if a check fails?

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