Add serial comma

src/backend/rewrite/rewriteHandler.c

@@ -1989,7 +1989,7 @@ view_is_auto_updatable(Relation view)
 		return gettext_noop("Views containing HAVING are not automatically updatable.");
 
 	if (viewquery->setOperations != NULL)
-		return gettext_noop("Views containing UNION, INTERSECT or EXCEPT are not automatically updatable.");
+		return gettext_noop("Views containing UNION, INTERSECT, or EXCEPT are not automatically updatable.");
 
 	if (viewquery->cteList != NIL)
 		return gettext_noop("Views containing WITH are not automatically updatable.");

src/test/regress/expected/updatable_views.out

@@ -155,7 +155,7 @@ DETAIL:  Views that return columns that are not columns of their base relation a
 HINT:  To make the view updatable, provide an unconditional ON DELETE DO INSTEAD rule or an INSTEAD OF DELETE trigger.
 DELETE FROM ro_view6;
 ERROR:  cannot delete from view "ro_view6"
-DETAIL:  Views containing UNION, INTERSECT or EXCEPT are not automatically updatable.
+DETAIL:  Views containing UNION, INTERSECT, or EXCEPT are not automatically updatable.
 HINT:  To make the view updatable, provide an unconditional ON DELETE DO INSTEAD rule or an INSTEAD OF DELETE trigger.
 UPDATE ro_view7 SET a=a+1;
 ERROR:  cannot update view "ro_view7"