documentcloud/underscore — pull request #999 by prust (2013-03-05 19:00:36+00:00)
Title: Make contains/include accept multiple values

Extended _.contains() so it accepts multiple values and returns true if all values are contained in the collection:

```javascript
_.include([1,2,3], 2, 3) // true
_.include([1,2,3], 3, 4) // false
```