grunt-contrib-stylus — pull request #40 by w33ble (2013-05-09 15:53:40+00:00)
Title: Added notes about the linenos and firebug options in stylus

Since middleware options are passed through to stylus, you can use linenos and firebug (among others, but those were the two that made sense to specifically point out). I've added notes about them to the README.