reword

Author: meooow25

containers/src/Data/IntSet/Internal.hs

@@ -688,8 +688,8 @@ intersections ss = case Foldable1.toNonEmpty ss of
 
 -- | @IntSet@s form a 'Semigroup' under 'intersection'.
 --
--- There is no @Monoid@ instance because it is impractical to construct
--- @mempty@, which is the @IntSet@ containing all @Int@s.
+-- A @Monoid@ instance is not defined because it would be impractical to
+-- construct @mempty@, the @IntSet@ containing all @Int@s.
 --
 -- @since FIXME
 newtype Intersection = Intersection { getIntersection :: IntSet }