title: Square brackets in parameter name
body: <p>I was wondering if it's possible to include square brackets in the parameter name, which is how Rails groups parameters. For example:</p>
  
  <pre><code>    + Parameters
          + person[age] (string) ... Person's age
  </code></pre>
  
  <p>Right now if I include the square bracket, the parameter doesn't get rendered.</p>
  
  <p>Thanks!</p>