racket
          operator is that the operator always takes exactly one argument, so it
          "transforms" any attempt at multiple arguments with a comma operator
          chain (and spits out an error for zero arguments).
        </p>
</div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2002-2005, 2010 Joel de Guzman, Dan Marsden, Thomas Heller<p>
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