jimweirich/rake — pull request #147 by aspiers (2012-11-19 15:28:11+00:00)
Title: Give a helpful failure message when obsolete usage is encountered.

Currently any Rakefiles which contain lines like

require 'rake/rdoctask'

will fail with the cryptic message "GONE" due to support for
deprecated tasks being removed. This patch makes it much easier
to identify and fix the offending obsolete usage.