title: In Sass, how to reference two parent classes with ampersand to compound with an element?
body: <p>Using the method <a href="https://stackoverflow.com/a/25655130/420217">found here</a>, it works, but not for two parent classes.</p>
  
  <p>For instance:</p>
  
  <pre><code>.one, .two {
    @at-root a#{&amp;} {
      color: blue;
    }
  }
  </code></pre>
  
  <p>Produces:</p>
  
  <pre><code>a.one, .two {
    color: blue;
  }
  </code></pre>
  
  <p>Rather than the intended:</p>
  
  <pre><code>a.one, a.two {
    color: blue;
  }
  </code></pre>
  
  <p>Is there any way to get the intended result using a similar method?</p>