[racket] TLS "atom?" definition for Scheme does not work in DrRacket

From: Matthias Felleisen (matthias at ccs.neu.edu)
Date: Wed Mar 4 08:32:39 EST 2015

All of this should work out of the box, w/o any problem. 

1. Please report on the following experiment. In the Definitions pane, type

(define rufus 0)

2. Click Run 

3. In the Interactions pane, type 

> rufus 

4. Please report the response of DrRacket. 

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