Fix rubocop offenses

Author: wasifhossain

Gemfile

@@ -53,7 +53,7 @@ group :bench do
 end
 
 group :test do
-  platforms *(@windows_platforms + [:ruby]) do
+  platforms(*(@windows_platforms + [:ruby])) do
     if version == 'master' || version >= '6'
       gem 'sqlite3', '~> 1.4'
     else
@@ -71,7 +71,7 @@ group :test do
   gem 'm', '~> 1.5'
   gem 'pry', '>= 0.10'
   gem 'byebug', '~> 8.2' if RUBY_VERSION < '2.2'
-  gem 'pry-byebug', platform: :ruby
+  gem 'pry-byebug', platforms: :ruby
 end
 
 group :development, :test do

test/benchmark/config.ru

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require File.expand_path(['..', 'app'].join(File::SEPARATOR), __FILE__)
 
 run Rails.application

test/support/ruby_2_6_rails_4_2_patch.rb

@@ -2,15 +2,17 @@
 
 if RUBY_VERSION >= '2.6.0'
   if Rails::VERSION::MAJOR < 5
-    class ActionController::TestResponse < ActionDispatch::TestResponse
-      def recycle!
-        # hack to avoid MonitorMixin double-initialize error:
-        @mon_mutex_owner_object_id = nil
-        @mon_mutex = nil
-        initialize
+    module ActionController
+      class TestResponse < ActionDispatch::TestResponse
+        def recycle!
+          # HACK: to avoid MonitorMixin double-initialize error:
+          @mon_mutex_owner_object_id = nil
+          @mon_mutex = nil
+          initialize
+        end
       end
     end
   else
-    puts "Monkeypatch for ActionController::TestResponse no longer needed"
+    puts 'Monkeypatch for ActionController::TestResponse no longer needed'
   end
 end