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Tutorial mode

If you're interested in the tutorial version of this repository, see
the "tutorial2" (POPL'13) or "tutorial" (RacketCon'12) branch in the
git repository.

Normal mode

If you're using Racket v5.3.1.9 or later, use

 raco pkg install scratchy

to download and install the "scratchy" package and collection.

For earlier versions, install this directory as a Racket collection
"scratchy", perhaps by running

 raco link scratchy
 raco setup scratchy scribblings/main

in the directory directory containing this "README.txt" (as opposed to
the parent directory of this one).