Avoid rubocop directive ending up in YARD docs

It turns out that YARD displays a special section "Dynamic Method
Handling" for classes that implement `method_missing` even though this
method is tagged as private. The rubocop directive was getting caught up
in the YARD docs.

lib/mocha/mock.rb

@@ -309,12 +309,10 @@ def all_expectations
     end
 
     # @private
-    # rubocop:disable Style/MethodMissingSuper
-    def method_missing(symbol, *arguments, &block)
+    def method_missing(symbol, *arguments, &block) # rubocop:disable Style/MethodMissingSuper
       handle_method_call(symbol, arguments, block)
     end
     ruby2_keywords(:method_missing)
-    # rubocop:enable Style/MethodMissingSuper
 
     # @private
     def handle_method_call(symbol, arguments, block)