title: multiple keys for one value in yaml
body: <p>Is it possible to use different keys for the same value?</p>
  
  <pre><code>[activerecord, activemodel]: 'test'
  </code></pre>
  
  <p>I expect the same result as with this:</p>
  
  <pre><code>activerecord: 'test'
  activemodel: 'test'
  </code></pre>