anchor.diff:  ```
   {: codeblock-file="pipeline.yml"}
   
  -In this case, `echo .buildkite/steps/flow` command will be added to the existing group.
  +The command `echo .buildkite/steps/flow` will be added to the existing group and the groups will be displayed as one in the UI.
  
positive.code: ```
  {: codeblock-file="pipeline.yml"}  
  
  As a result, the groups will be merged into one in the UI, and the `"docker build"` step will be added to the existing group.
  
  ```yml
  - group: "Setup"
  
negative.code:   <tr>
      <td><code>key</code></td>
      <td>
      	A unique string to identify the step, block, or group. Alias: `identifier` or `id`.<br>
        <em>Example:</em> <code>"test-suite"</code>
      </td>
    </tr>  
  