XmlMini autoload cause endless loop with Ruby 1.9.1

I'm using Ruby 1.9.1-rc2 (ruby 1.9.1p0 (2009-01-20 revision 21700) [i386-darwin9.5.0]) and trying to run unit tests for AS.

I noticed an endless loop for all the cases which are using XmlMini, which is autoloaded:

autoload :XmlMini, 'active_support/xml_mini'

Autoload expect to find ActiveSupport::XmlMini (look at the second argument), but it doesn't exist, 'cause XmlMini is a top-level module. It cause an endless loop.

The solution (attached as patch) is to include XmlMini in ActiveSupport namespace.