Use unlines in GenOrdAST too.
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@ -117,8 +117,5 @@ items = concat
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u = undefined
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joinLines :: [String] -> String
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joinLines xs = concat [x ++ "\n" | x <- xs]
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main :: IO ()
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main = putStr $ joinLines $ genHeader ++ items
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main = putStr $ unlines $ genHeader ++ items
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