anchor.diff:    </tr>
     <tr>
       <td><code>instance_id</code></td>
  -    <td>Unique ID that identifies the application instance. For instances running on Diego, this is identical to the <a href="#CF-INSTANCE-GUID">CF_INSTANCE_GUID</a> variable.</td>
  +    <td>Unique ID that identifies the application instance. This is identical to the <a href="#CF-INSTANCE-GUID">CF_INSTANCE_GUID</a> variable.</td>
     </tr>
     <tr>
       <td><code>instance_index</code></td>
  
positive.code: Example: `CF_INSTANCE_ADDR=1.2.3.4:5678`
  
  ### <a id='CF-INSTANCE-GUID'></a>CF\_INSTANCE\_GUID ###
  The UUID of the particular instance of the app. Available only to instances on Diego Cells.
  
  Example: `CF_INSTANCE_GUID=41653aa4-3a3a-486a-4431-ef258b39f042`
  
  
negative.code: [Node.js](../../buildpacks/node/node-tips.html#env-var), and
  [Ruby](../../buildpacks/ruby/ruby-tips.html#env-var).
  
  <table border="1" class="nice">
    <tr>
      <th>Env Var</th>
      <th>Running</th>
      <th>Staging</th>
      <th>Task</th>
    </tr>
    <tr>
      <td><code>BUILDPACK_DIR</code></td>
      <td></td>
      <td>x</td>
      <td></td>
    </tr>
    <tr>
      <td><code>CF_INSTANCE_ADDR</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>CF_INSTANCE_GUID</code></td>
      <td>x</td>
      <td></td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>CF_INSTANCE_INDEX</code></td>
      <td>x</td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td><code>CF_INSTANCE_INTERNAL_IP</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>CF_INSTANCE_IP</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>CF_INSTANCE_PORT</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>CF_INSTANCE_PORTS</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>CF_STACK</code></td>
      <td></td>
      <td>x</td>
      <td></td>
    </tr>
    <tr>
      <td><code>DATABASE_URL</code></td>
      <td>x</td>
      <td></td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>HOME</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>INSTANCE_GUID</code></td>
      <td>x</td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td><code>INSTANCE_INDEX</code></td>
      <td>x</td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td><code>LANG</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>MEMORY_LIMIT</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>PATH</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>PORT</code></td>
      <td>x</td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td><code>PWD</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>TMPDIR</code></td>
      <td>x</td>
      <td></td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>USER</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>VCAP_APP_HOST</code></td>
      <td>x</td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td><code>VCAP_APP_PORT</code></td>
      <td>x</td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td><code>VCAP_APPLICATION</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
    <tr>
      <td><code>VCAP_SERVICES</code></td>
      <td>x</td>
      <td>x</td>
      <td>x</td>
    </tr>
  </table>
  
  ### <a id='CF-INSTANCE-ADDR'></a>CF\_INSTANCE\_ADDR ###
  The [CF\_INSTANCE\_IP](#CF-INSTANCE-IP) and
  [CF\_INSTANCE\_PORT](#CF-INSTANCE-PORT) of the app instance in the format
  