lib/rubocop/cop/mixin/negative_conditional.rb in rubocop-0.20.0 vs lib/rubocop/cop/mixin/negative_conditional.rb in rubocop-0.20.1

@@ -13,10 +13,10 @@
         condition = condition.children.last while condition.type == :begin
 
         if condition.type == :send
           _object, method = *condition
           if method == :! && !(node.loc.respond_to?(:else) && node.loc.else)
-            add_offense(node, :expression, error_message)
+            add_offense(node, :expression)
           end
         end
       end
     end
   end