anchor.diff:  that are available to you.
   
   The example shows three of the available managed database-as-a-service providers
  -and the plans that they offer: `cleardb` MySQL, `elephantsql` PostgreSQL as a
  -Service, and `mongolab` MongoDB-as-a-Service.
  +and the plans that they offer: `cleardb` MySQL and `elephantsql` PostgreSQL as a
  +Service.
   
   <pre class="terminal">
   $  cf marketplace
  
positive.code: cleardb          spark, boost, amp, shock      Highly available MySQL for your Apps
  ...
  elephantsql      turtle, panda, hippo, elephant   PostgreSQL as a Service
  ...
  mongolab         sandbox       Fully-managed MongoDB-as-a-Service
  ...
  </pre>
  
  
negative.code: Common reasons deploying an app fails include:
  
  * You did not successfully create and bind a needed service instance to the app,
  such as a PostgreSQL service instance.
  Refer to Step 2: Create and Bind a Service Instance for a Ruby Application.
  * You did not successfully create a unique URL for the app.
  Refer to the troubleshooting tip <strong>App Requires Unique URL</strong>.
  