anchor.diff:    RACK_ENV: ${rails-env}
   ~~~
   
  +`cf push` deploys the application to a container on the server. The variables belong to the container environment.
  +
   While the application is running, `cf` allows you to operate on environment variables.
   
   * View all variables:
  
positive.code:     redis-burnin-77
  ~~~
  
  ## <a id='minimize-duplication'></a>Minimizing Duplication ##
  
  In manifests where multiple applications share settings or services, you begin to see content duplicated. While the manifests still work, duplication increases the risk of typographical errors which cause deployment to fail.
  
negative.code: 
  The `services` block consists of a heading, then one or more service instance names.
  
  Whoever creates the service chooses the service instance names. These names can convey logical information, as in `backend_queue`, describe the nature of the service, as in `mysql_5.x`, or do neither, as in the example below.
  
  ~~~
    services:
  