[plt-dev] error in teaching languages

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Sun Sep 20 20:13:09 EDT 2009

I noticed that 'error' changed in the teaching languages. In 4.2.1, it
used to take two arguments, but now it takes 1. Is that intentional?
(Sorry if I missed a message somewhere about that.)


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