[racket] What is a "zed document" (was: programming quote)

From: Mike Eggleston (mikeegg1 at me.com)
Date: Thu Mar 21 12:30:04 EDT 2013

In the most recent (that I've read) messsage in the "programming quote"
there is a mention of a "zed document".  What is a "zed document"?

Mike

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