[racket] Intro Project: Racket support in MediaWiki's GeSHi highligher

Folks,

I have notified the GeSHi and Rosetta Code (a user of MediaWiki) of my
racket.php script, and have made it a personal mission to poke them every
week or so. However, they are both very busy and assure me that integrating
it *is* on their to do lists.

I have put a note on the Intro Projects Wiki page to this effect; I hope
nobody objects.

FYI racket.php can be found at
https://github.com/tim-brown/geshi-racket/blob/master/racket.php
and you can put it into your GeSHi syntaxes directory if you want to use/
test it.

Tim

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