anchor.diff:  
   <pre class="terminal">
   $ cf service-brokers
  -Getting service brokers as admin...
  +Getting service brokers as admin...Cloud Controller
   OK
   
   Name            URL
  
positive.code: 
  Updating a broker is how to ingest changes a broker author has made into Cloud
  Foundry.
  Similar to adding a broker, update causes cloud controller to fetch the catalog
  from a broker, validate it, and update the cloud controller database with any
  changes found in the catalog.
  
  Update also provides a means to change the basic auth credentials cloud
  
negative.code: 
  ## <a id='register-broker'></a>Register a Broker ##
  
  Registering a broker causes Cloud Controller to fetch and validate the catalog
  from your broker, and save the catalog to the Cloud Controller database.
  The basic auth username and password which are provided when adding a broker are
  encrypted in Cloud Controller database, and used by the Cloud Controller to
  authenticate with the broker when making all API calls.
  Your service broker should validate the username and password sent in every
  request; otherwise, anyone could curl your broker to delete service instances.
  