thoughtbot/bourbon — pull request #274 by jmmcduffie (2013-09-13 00:30:33+00:00)
Title: Add Roboto to the `$helvetica` font stack for Android support

Most Android devices do not have either Helvetica Neue or Helvetica available, but as of Android 4.0 "Ice Cream Sandwich" there is a look-alike font called Roboto that serves as a decent stand-in for the (better) Helvetica fonts.