Gets v3 request example saving as well as response example saving

Adds rubocop to the gemset

adds guard to the gemset for testing

test-app/spec/rake/rswag_specs_swaggerize_spec.rb

@@ -1,15 +1,18 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'rake'
 
 describe 'rswag:specs:swaggerize' do
   let(:swagger_root) { Rails.root.to_s + '/swagger' }
-  before do 
+  before do
     TestApp::Application.load_tasks
-    FileUtils.rm_r(swagger_root) if File.exists?(swagger_root)
+    FileUtils.rm_r(swagger_root) if File.exist?(swagger_root)
   end
 
   it 'generates Swagger JSON files from integration specs' do
-    expect { Rake::Task['rswag:specs:swaggerize'].invoke }.not_to raise_exception
+    Rake::Task['rswag:specs:swaggerize'].invoke
+    # expect { }.not_to raise_exception(StandardError)
     expect(File).to exist("#{swagger_root}/v1/swagger.json")
   end
 end