/usr/share/doc/haskell98-tutorial/html/code/Fringe.lhs is in haskell98-tutorial 200006-2-1.1.
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1 2 3 4 5 6 | > module Fringe where
> import Tree ( Tree(..))
> fringe :: Tree a -> [a] -- A different definition of fringe
> fringe (Leaf x) = [x]
> fringe (Branch x y) = fringe x
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