title: strange character \u2b00b in javascript code
body: <p>A for loop didn't compile on some code we were working on. It looks innocuous enough :</p>
  
  <pre><code>for (i in col) {
  
  }
  </code></pre>
  
  <p>Webstorm didn't like it, and extJS didn't like it. On first inspection there was nothing wrong with it, but when we put it in JSFiddle it comes up with an error</p>
  
  <p><a href="http://jsfiddle.net/oliverwatkins/tn2dmnou/" rel="nofollow">http://jsfiddle.net/oliverwatkins/tn2dmnou/</a></p>
  
  <p>These strange invisible <strong>\u2b00b</strong> characters got into the code.</p>
  
  <p>what is it? Google gives back nothing useful. And how did it get there?</p>