title: Isn't "text-overflow: ellipsis" valid CSS?
body: <p>This code triggers an error when run through the <a href="http://jigsaw.w3.org/css-validator" rel="nofollow noreferrer">W3C CSS Validator</a>:</p>
  
  <pre><code>p{
      text-overflow: ellipsis;
  }
  </code></pre>
  
  <p>I get:</p>
  
  <pre>
  Line     Code context      Error/Warning
  2        p                 Parse Error [empty string]
  </pre>
  
  <p>Is it just a bug in the validator or am I missing something really obvious?</p>