title: Regular expression, "just group, don't capture", doesn't seem to work
body: <pre><code>x = "abcdefg"
  x = x.match(/ab(?:cd)ef/)
  </code></pre>
  
  <p>shouldn't x be abef? it is not, it is actually abcdef</p>
  
  <p>Why is it that my ?: not having any effect? (of course my understanding could very well be wrong)</p>