travis-ci/travis-core — pull request #155 by henrikhodne (2012-12-13 00:02:27+00:00)
Title: Fix a bug in 0b1bf72/#137

Turns out you can have a single branch under branches.only.

https://github.com/travis-ci/travis-core/commit/2804d041c65c4ae850ec68f2d7fdca4d2c3b3ead#commitcomment-2299665