anchor.diff:   		<tr>
    			<td>Prefixes</td>
    			<td><code>!</code></td>
  + 		</tr>
  + 		<tr>
  + 			<td>Comments</td>
  + 			<td><code>// This is a comment</code></td>
    		</tr>
    	</tbody>
    </table>
  
positive.code: build.branch =~ /features\/.+/
  ```
  
  To run only when the branch ends with `/release-123`, such as `feature-123/release-123`:
  
  ```js
  build.branch =~ /.+\/release-123/
  
negative.code:     - command: ./scripts/tests.sh
        label: tests
        if: |
        	// Don't when the message contains "skip me"
        	// Only run on feature branches
          build.message != "skip me" &&
            build.branch == /^feature\/.+/
  ```
  