generate 'app/assets/images' directory when creating new rails app

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -56,6 +56,7 @@ def gitignore
     def app
       directory 'app'
 
+      keep_file  'app/assets/images'
       keep_file  'app/mailers'
       keep_file  'app/models'
 

railties/test/generators/app_generator_test.rb

@@ -260,6 +260,11 @@ def test_creation_of_a_test_directory
     assert_file 'test'
   end
 
+  def test_creation_of_app_assets_images_directory
+    run_generator
+    assert_file "app/assets/images"
+  end
+
   def test_creation_of_vendor_assets_javascripts_directory
     run_generator
     assert_file "vendor/assets/javascripts"