substack/browser-pack — pull request #7 by thlorenz (2013-03-17 03:30:47+00:00)
Title: combining sourcemap comments found in the passed source into the bundle source map

Needed to make [this](http://thlorenz.github.com/WebGLCraft/) possible.
You can now see and debug original files if their generated source includes source maps, as is the case for the coffeeify transform.