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Original-Via: uk.ac.st-and.cs; Wed, 13 Nov 91 16:58:45 GMT
The operator which was called `in` in version 1.0 seems to have
vanished without trace since `in` became a reservedid. Can I suggest
it be restored to PreludeList, possibly with the name `contains`:
contains :: (Eq a) => [a] -> a -> Bool
