Example diff when adding attributes on a project that doesn't use trailing commas on multiline arrays and hashes.

without-trailing-commas-example.diff

diff --git a/app/controllers/account/sites_controller.rb b/app/controllers/account/sites_controller.rb
index 6f5936a0..5734b58b 100644
--- a/app/controllers/account/sites_controller.rb
+++ b/app/controllers/account/sites_controller.rb
@@ -64,9 +64,13 @@ class Account::SitesController < Account::ApplicationController
     def site_params
       params.require(:site).permit(
         :name,
-        :description
+        :description,
+        :keywords,
+        :copyright
       )
     end
 end
diff --git a/app/controllers/api/v1/sites_controller.rb b/app/controllers/api/v1/sites_controller.rb
index 39222e34..85b6c1fe 100644
--- a/app/controllers/api/v1/sites_controller.rb
+++ b/app/controllers/api/v1/sites_controller.rb
@@ -49,9 +49,13 @@ class Api::V1::SitesController < Api::V1::AuthenticatedController
     def site_params
       params.require(:site).permit(
         :name,
-        :description
+        :description,
+        :keywords,
+        :copyright
       )
     end
 end
diff --git a/app/serializers/api/v1/site_serializer.rb b/app/serializers/api/v1/site_serializer.rb
index 15f4fd81..70d18832 100644
--- a/app/serializers/api/v1/site_serializer.rb
+++ b/app/serializers/api/v1/site_serializer.rb
@@ -2,5 +2,7 @@ class Api::V1::SiteSerializer < ActiveModel::Serializer
   attributes :id,
   :team_id,
   :name,
-  :description
+  :description,
+  :keywords,
+  :copyright
 end
diff --git a/app/views/account/sites/_site.json.jbuilder b/app/views/account/sites/_site.json.jbuilder
index 1f3a284b..5fd059f1 100644
--- a/app/views/account/sites/_site.json.jbuilder
+++ b/app/views/account/sites/_site.json.jbuilder
@@ -2,5 +2,7 @@ json.extract! site,
   :id,
   :team_id,
   :name,
-  :description
+  :description,
+  :keywords,
+  :copyright
 json.url account_site_url(site, format: :json)
diff --git a/test/controllers/account/sites_controller_test.rb b/test/controllers/account/sites_controller_test.rb
index 4391af14..0c796d26 100644
--- a/test/controllers/account/sites_controller_test.rb
+++ b/test/controllers/account/sites_controller_test.rb
@@ -26,7 +26,9 @@ class Account::SitesControllerTest < ActionDispatch::IntegrationTest
       post url_for([:account, @team, :sites]), params: {
         site: {
           name: @site.name,
-          description: @site.description
+          description: @site.description,
+          keywords: @site.keywords,
+          copyright: @site.copyright
         }
       }
     end
@@ -48,7 +50,9 @@ class Account::SitesControllerTest < ActionDispatch::IntegrationTest
     patch url_for([:account, @site]), params: {
       site: {
         name: @site.name,
-        description: @site.description
+        description: @site.description,
+        keywords: @site.keywords,
+        copyright: @site.copyright
       }
     }
     assert_redirected_to url_for([:account, @site])
diff --git a/test/controllers/api/v1/sites_controller_test.rb b/test/controllers/api/v1/sites_controller_test.rb
index ee2e2506..3ed74714 100644
--- a/test/controllers/api/v1/sites_controller_test.rb
+++ b/test/controllers/api/v1/sites_controller_test.rb
@@ -101,7 +100,9 @@ class Api::V1::SitesControllerTest < ActionDispatch::IntegrationTest
     # post an attribute update to the api and ensure nothing is seriously broken.
     put url_for([:api, :v1, @site]), params: {
       site: {
         name: 'Alternative String Value'
-        description: 'Alternative String Value'
+        description: 'Alternative String Value',
+        keywords: 'Alternative String Value',
+        copyright: 'Alternative String Value'
       }
     }, headers: auth_header
     assert_response :success