anchor.diff:  ...
   </pre>
   
  -Run `cf create-service SERVICE PLAN SERVICE_INSTANCE` to create a service instance for your app.
  -
  -Choose a service and plan from the list, and provide a unique name for the service instance. The example shows creating a service instance named `rails-postgres` that uses the `elephantsql` service and the `turtle` plan. 
  +Run `cf create-service SERVICE PLAN SERVICE_INSTANCE` to create a service instance for your app. Choose a SERVICE and PLAN from the list, and provide a unique name for the SERVICE_INSTANCE. 
  +
  +The example shows creating a service instance named `rails-postgres` that uses the `elephantsql` service and the `turtle` plan. 
  +
   
   <pre class="terminal">
   
  
positive.code: 
  1. Add `gem rails_12factor group: :production` to your Gemfile.
  
      <pre class="note"><strong>Note</strong>:  This gem includes the <code>rails&#095;serve&#095;static&#095;assets</code> gem that enables your Rails app to run in production with the static assets serving functionality. The <code>rails&#095;serve&#095;static&#095;assets</code> gem does this by automatically modifying the <code>config.serve&#095;static&#095;assets</code> configuration parameter from <code>false</code> to <code>true</code>. Do not change the value for this option. For more information, refer to the <a href="https://github.com/heroku/rails_12factor">Rails_12factor GitHub README</a>.</pre>
  
  1. Run `bundle install` to update your Gemfile.
  
  
negative.code: 
  This guide is intended to walk you through deploying a Ruby on Rails (RoR) app to <%=vars.product_full%>. You can choose whether to push a sample app, your own app, or both.
  
  If at any time you experience a problem following the steps below, try checking the <%=vars.known_issues%> topic, or refer to the [Troubleshooting Application Deployment and Health](./../../devguide/deploy-apps/troubleshoot-app-health.html) topic for more tips.
  
  ## <a id='deploy-sample'></a>Deploy a RoR Sample Application ##
  
  