ActiveSupport::Numberic overloads inspect but not to_s

Imported from Lighthouse. Original ticket at: http://rails.lighthouseapp.com/projects/8994/tickets/6577 Created by Curtis Jennings Schofield - 2011-03-15 00:34:31 UTC

inspect has pretty '4 days' output - views call to_s on Numeric types - can we please

class ActiveSupport::Duration
  alias :to_s :inspect
end