reverse_order_value= is not private, so no need to send

It's not public API, but is not private scoped.

activerecord/lib/active_record/relation/query_methods.rb

@@ -859,7 +859,7 @@ def symbol_unscoping(scope)
 
       case scope
       when :order
-        self.send(:reverse_order_value=, false)
+        self.reverse_order_value = false
         result = []
       else
         result = [] unless single_val_method