Remove unnatural indent in doc

Summary:
http://facebook.github.io/react-native/docs/animated.html#animatedvalue

before
![before](https://cloud.githubusercontent.com/assets/615282/25734690/172c105e-3198-11e7-99a6-394a88559924.png)

after
![after](https://cloud.githubusercontent.com/assets/615282/25734692/1b89687c-3198-11e7-83e8-a53f0b6c46b7.png)
Closes facebook#13794

Differential Revision: D5472001

Pulled By: hramos

fbshipit-source-id: 5ac16a15f2d1a63392ff442ab9ba177e9bc90721

website/layout/AutodocsLayout.js

@@ -490,13 +490,13 @@ var APIDoc = React.createClass({
                 <Header level={2} toSlug={cls.name}>
                   class {cls.name}
                 </Header>
-                <ul>
+                <div>
                   {cls.docblock && <Marked>
                     {removeCommentsFromDocblock(cls.docblock)}
                   </Marked>}
                   {this.renderMethods(cls.methods, namedTypes)}
                   {this.renderProperties(cls.properties)}
-                </ul>
+                </div>
               </span>
             );
           })}