hadley/ggplot2 — pull request #686 by jrnold (2012-10-11 05:15:57+00:00)
Title: put subclass first for class attributes of subclasses of element

Cleaner commit of pull request #683.

I reordered the class attribute of element objects so that the subclass is listed first. As it stands now, an S3 method could not be written for element_blank, etc.