[plt-scheme] match single symbol

From: Jon Rafkind (rafkind at cs.utah.edu)
Date: Thu Sep 3 00:28:03 EDT 2009

> What have literals (which compare against a single value) got to do
> with predicates (which often match a whole class of values)?
> --Carl

Er yea, sorry I was totally confused for a second. I'll just write my 
own matchers with define-match-expander.

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