less/less.js — pull request #1622 by Sinetheta (2013-10-29 18:15:36+00:00)
Title: added sourceMappingURL option

I just matched the way [Uglify currently does it](https://github.com/gruntjs/grunt-contrib-uglify/commit/0066be8645b97740bc74f58f904943198841ffd9).

I'd be happy to add a test when I figure out how :wink:. At least it doesn't break any current tests.