tiimgreen/github-cheat-sheet — pull request #11 by dideler (2014-04-13 18:58:23+00:00)
Title: Use relative links for internal content

Relative links should be preferred.

Absolute links are not recommended because
- they're very long which makes them harder to read
- will have to update all the links if
- the repo is forked
- the owner of the repo changes
- the owner's username changes
- the repo is renamed

For more info, see https://help.github.com/articles/relative-links-in-readmes

P.S. A section on relative links might be useful.