Fix mispelling in docs

Author: Ericson2314

src/Data/Patch.hs

@@ -85,7 +85,7 @@ instance Group (Proxy x) where
 
 -- | Const lifts groups into a functor.
 deriving instance Group a => Group (Const a x)
--- | Ideitnty lifts groups pointwise (at only one point)
+-- | Identity lifts groups pointwise (at only one point)
 deriving instance Group a => Group (Identity a)
 
 -- | Functions lift groups pointwise.

src/Data/Semigroup/Additive.hs

@@ -44,7 +44,7 @@ instance Additive (Proxy x)
 
 -- | Const lifts additive semigroups into a functor.
 instance Additive a => Additive (Const a x)
--- | Ideitnty lifts additive semigroups pointwise (at only one point)
+-- | Identity lifts additive semigroups pointwise (at only one point)
 instance Additive a => Additive (Identity a)
 
 -- | Functions lift additive semigroups pointwise.