Use -r with less for help output

groff outputs control characters which less will display escaped by
default.  Since it's all safe (non-cursor moving) commands like bold,
underline, etc., by default allow less to process them with -r

![less-non-escaped](https://f.cloud.github.com/assets/108448/1251175/749ff7e6-2b1b-11e3-9e5d-e182158a253a.png)