Using backticks in ddoc headers results in ugly <pre> sections

Examples:

<img width="1047" alt="screen shot 2016-03-07 at 3 56 40 pm" src="https://cloud.githubusercontent.com/assets/680068/13583002/3aeb494c-e47d-11e5-83ef-6eeaf5340202.png">

<img width="403" alt="screen shot 2016-03-07 at 3 58 08 pm" src="https://cloud.githubusercontent.com/assets/680068/13583035/6bcca740-e47d-11e5-84e2-e3ea9444cbc0.png">
