jashkenas/backbone — pull request #3056 by suprememoocow (2014-03-11 14:31:59+00:00)
Title: Better documentation around the behaviour of `once` when multiple events are passed in

`EventEmitter.once` will fire once per event -- as opposed to once -- when multiple events are passed in using the space-separated syntax. This can be fairly counter-intuitive. This PR updates the documentation to make not of this.