[racket] Help with sockets.

From: antoine (antoine.brand at sfr.fr)
Date: Wed Apr 30 17:08:07 EDT 2014

To digress 

> The reason is because certain Strings can't be represented in the Text
> node of XML documents.  We ran across this problem in practice when
> students started writing programs and copying and pasting content from
> the web, which introduced characters like vertical tabs and other
> characters that can't be represented in XML text nodes.

What about CDATA, or escaping xml sequences? 

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