github/developer.github.com — pull request #656 by djreimer (2014-12-03 17:40:12+00:00)
Title: Mark the labels param as required for issue creation

Hitting the create issue API endpoint without the `labels` param now returns a 422. This clarifies the docs by marking the `labels` as required.

See octokit/octokit.rb#538.

/cc @pengwynn