Trailing whitespace warnings when there isn't

Given the following file:

``` javascript
/** @jsx React.DOM */
var React = require('react')

module.exports = React.createClass({
  render: function () {
    return <div className="error">
      <h3>{this.error.message}</h3>
    </div>
  }
})
```

`jsxhint` reports a trailing whitespace error on line 6
