title: How to add a comment to flyway migration
body: <p>I am trying to make my big migration more self explaining and that's why I need to add some comments to it. However, I tried a few approaches and haven't succeeded with them. 
  I tried: </p>
  
  <ul>
  <li><code>//</code></li>
  <li><code>#</code></li>
  <li><code>&lt;!-- TEXT --&gt;</code></li>
  </ul>
  
  <p>Error:</p>
  
  <pre><code>   SQL State  : 42601
     Error Code : 0
     Message    : ERROR: syntax error at or near "//"
     Position: 1
  </code></pre>
  
  <p>Is there a way I can add a comment to flyway SQL migration? </p>