Improve some haddocks

Author: Ericson2314

src/Data/Semigroup/Additive.hs

@@ -1,7 +1,7 @@
 {-# LANGUAGE ConstraintKinds #-}
 
 {-|
-Description : A class for commutative semigroups
+Description : A deprecated module containing a deprecated alias to the class for commutative semigroups
 -}
 module Data.Semigroup.Additive
   {-# DEPRECATED "Use 'Data.Semigroup.Commutative'" #-}
@@ -11,4 +11,5 @@ module Data.Semigroup.Additive
 import Data.Semigroup.Commutative
 
 {-# DEPRECATED Additive "Use 'Data.Semigroup.Commutative.Commutative'" #-}
+-- | Deprecated alias for 'Commutative'
 type Additive = Commutative