Make Naming/MethodParameterName cop aware of argument forwarding

CHANGELOG.md

@@ -15,6 +15,7 @@
 * [#7576](https://github.com/rubocop-hq/rubocop/issues/7576): Fix an error for `Gemspec/OrderedDependencies` when using a local variable in an argument of dependent gem. ([@koic][])
 * [#7595](https://github.com/rubocop-hq/rubocop/issues/7595): Make `Style/NumericPredicate` aware of ignored methods when specifying ignored methods. ([@koic][])
 * [#7607](https://github.com/rubocop-hq/rubocop/issues/7607): Fix `Style/FrozenStringLiteralComment` infinite loop when magic comments are newline-separated. ([@pirj][])
+* [#7602](https://github.com/rubocop-hq/rubocop/pull/7602): Ensure proper handling of Ruby 2.7 syntax. ([@drenmi][])
 
 ## 0.78.0 (2019-12-18)
 

lib/rubocop/cop/naming/method_parameter_name.rb

@@ -49,7 +49,7 @@ class MethodParameterName < Cop
         def on_def(node)
           return unless node.arguments?
 
-          check(node, node.arguments)
+          check(node, node.arguments.reject(&:forward_args_type?))
         end
         alias on_defs on_def
       end

spec/rubocop/cop/naming/method_parameter_name_spec.rb

@@ -10,6 +10,14 @@
     }
   end
 
+  context 'when using argument forwarding', :ruby27 do
+    it 'does not register an offense' do
+      expect_no_offenses(<<~RUBY)
+        def foo(...); end
+      RUBY
+    end
+  end
+
   it 'does not register for method without parameters' do
     expect_no_offenses(<<~RUBY)
       def something