Bryan O'Sullivan committed f37ba6c

Minor tweaks.

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 uncons :: Text -> Maybe (Char, Text)
 uncons t@(Text arr off len)
     | len <= 0  = Nothing
-    | otherwise = Just (c, Text arr (off+d) (len-d))
+    | otherwise = Just (c, textP arr (off+d) (len-d))
     where (c,d) = iter t 0
 {-# INLINE uncons #-}
+-- | Lifted from Control.Arrow and specialized.
 second :: (b -> c) -> (a,b) -> (a,c)
 second f (a, b) = (a, f b)
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