4632N/ADescription : <optional short description entry>
4632N/ACopyright : (c) <Authors or Affiliations>
4632N/AStability : unstable | experimental | provisional | stable | frozen
4632N/APortability : portable | non-portable (<reason>)
4632N/Amap1 :: (a -> b) -> [a] -> [b]
4632N/Amap1 f (x:xs) = f x : map1 f xs
4632N/A "map_map" forall f g xs -> map1 f (map1 g xs) === map1 (
f.g) xs