add styles for code that is inline within a list item

Before code change
![rsvp](https://f.cloud.github.com/assets/514063/1694221/5c7bddc8-5e9d-11e3-86fb-d1bee50a72c9.png)

After code change
![rsvp-2](https://f.cloud.github.com/assets/514063/1694219/4c0f82fa-5e9d-11e3-84ea-b118385ac6eb.png)