github/developer.github.com — pull request #52 by ctshryock (2012-02-06 18:00:38+00:00)
Title: Add note to verbs explaination about PUT and empty body requests

When making a request via PUT with an empty body, the content-length header
needs to be set to zero.

See http://developer.github.com/v3/orgs/teams/#add-team-member as an example of a PUT request with empty body