title: Strange compilation error after I upgrade to Xcode-beta 7
body: <p>Here is my code. </p>
  
  <pre><code>        var indexPath = self.tableView.indexPathForCell(cell)
          self.tableView.beginUpdates()
          self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation:.Automatic)
          self.tableView.endUpdates()
  </code></pre>
  
  <p>I got the following compile error:</p>
  
  <blockquote>
    <p>Use of unresolved identifier 'Automatic'</p>
  </blockquote>
  
  <p>I tried UITableViewAnimation.Automatic. But failed too.</p>
  
  <p>What's wrong with it? Thanks.</p>