anchor.diff:    </tr>
   </table>
   
  -_Optional attributes:_  
  +_Optional attributes:_
   
   <table data-attributes>
     <tr>
  
positive.code:   </tr>
  </table>
  
  ## Parallel groups  
  
  If you put two or more group steps in a YAML config file consecutively, they will run in parallel. For example:  
  
  
negative.code: 
  ## Group merging
  
  Different groups that have the same `group` name or `label` and are defined consecutively in the pipeline will be merged together in the Buildkite UI.
  
  ```
  <section class="Docs__note">
  