middleman/middleman — pull request #938 by pulletsforever (2013-06-15 20:32:51+00:00)
Title: Prevent relative asset helper from munging data URIs

Fully qualified URLs are considered to be only those with `//` in them (another issue, as that is valid, but odd in the path) but this excludes URLs that start with `data:`

This fix adds an explicit fix for that common senario.