Update doctest to be compatible with newer GHC

servant/src/Servant/API/TypeLevel.hs

@@ -110,7 +110,7 @@ type family IsElem' a s :: Constraint
 --
 -- >>> ok (Proxy :: Proxy (IsElem ("bye" :> Get '[JSON] Int) SampleAPI))
 -- ...
--- ... Could not deduce...
+-- ... Could not ...
 -- ...
 --
 -- An endpoint is considered within an api even if it is missing combinators
@@ -151,7 +151,7 @@ type family IsElem endpoint api :: Constraint where
 --
 -- >>> ok (Proxy :: Proxy (IsSubAPI (SampleAPI :<|> Get '[JSON] Int) SampleAPI))
 -- ...
--- ... Could not deduce...
+-- ... Could not ...
 -- ...
 --
 -- This uses @IsElem@ for checking; thus the note there applies here.
@@ -174,7 +174,7 @@ type family AllIsElem xs api :: Constraint where
 --
 -- >>> ok (Proxy :: Proxy (IsIn (Get '[JSON] Int) (Header "h" Bool :> Get '[JSON] Int)))
 -- ...
--- ... Could not deduce...
+-- ... Could not ...
 -- ...
 type family IsIn (endpoint :: *) (api :: *) :: Constraint where
   IsIn e (sa :<|> sb)                = Or (IsIn e sa) (IsIn e sb)

servant/src/Servant/Links.hs

@@ -92,7 +92,7 @@
 -- >>> let bad_link = Proxy :: Proxy ("hello" :> Delete '[JSON] NoContent)
 -- >>> safeLink api bad_link
 -- ...
--- ...Could not deduce...
+-- ...Could not ...
 -- ...
 --
 --  This error is essentially saying that the type family couldn't find