reStructuredText preview does not seem to support syntax highlighting

[stharding]

The following reStructuredText results in a non-highlighted code-block

.. code:: javascript

      function test()
      {
        console.log("test");
      }

This is how it renders on my machine (using OmniMarkupPreviewer, Sublime Text 3, OS X, in Chrome):

However, previewing Markdown does do correct syntax highlighting. The following:

```javascript
function test()
{
  console.log("test");
}

renders as:
![image](https://cloud.githubusercontent.com/assets/451540/3679292/b81b02c6-12a2-11e4-918c-a7d3e11c7572.png)

on my machine.

[stharding]

I can confirm that this is also an issue on Ubuntu 14.04 / Sublime Text 3 / Chrome

[stharding]

That fixed it for me. Thanks!