mbostock/queue — pull request #17 by icylace (2013-06-05 23:43:01+00:00)
Title: an apparent off by 1 error

According to the documentation the `parallelism` variable represents the number of concurrently running queue items but in practice it seemed off by 1. I confirmed this by testing out a queue set to `queue(1)` which resulted in nothing running.

The edit I made should resolve this.