Fix a typo

libraries/base/Foreign/C/Types.hs

@@ -44,7 +44,7 @@ module Foreign.C.Types
         , CIntPtr(..),  CUIntPtr(..), CIntMax(..),   CUIntMax(..)
 
           -- ** Numeric types
-          -- | These types are are represented as @newtype@s of basic
+          -- | These types are represented as @newtype@s of basic
           -- foreign types, and are instances of
           -- 'Prelude.Eq', 'Prelude.Ord', 'Prelude.Num', 'Prelude.Read',
           -- 'Prelude.Show', 'Prelude.Enum', 'Typeable' and 'Storable'.