Move the CSS for <code> to <pre>

I was having an issue where my code section wasn't being styled correctly. Instead of having a background around the entire block of code it would just put a background around the text. This led to a very messy look. I fixed it by changing the css block for the code selector to be for a pre.

You can see a photo of the issue I was having here: http://imgur.com/w54LrJR.png
The fixed version can be seen on my blog: http://thatdipguy.com/wrapping-up-television-data/