Fix layout in kind test

Author: liam923

tests/test-dirs/syntax-document/language-extensions.t/run.t

@@ -429,7 +429,7 @@ Convenience function to ensure we haven't made any syntax errors.
   >   val id2 : ('a : value) -> ('a : value)
   > end
   > let f (x : (_ : value)) = (x : (_ : value))
-  > type t : nativeint mod everything
+  > type t : float64 mod everything
   > EOF
 
   $ syntax_errors kinds.ml
@@ -500,14 +500,14 @@ Convenience function to ensure we haven't made any syntax errors.
   Kind abbreviation
 
   $ syn_doc_name kinds.ml 7 13
-  type t : nativeint mod everything
+  type t : float64 mod everything
                ^
-  No documentation found
+  Kind abbreviation
 
   $ syn_doc_name kinds.ml 7 28
-  type t : nativeint mod everything
+  type t : float64 mod everything
                               ^
-  No documentation found
+  Mode (in kind)
 
 // include functor