ActiveRecord Readme correction

[lighthouse-import]

Imported from Lighthouse. Original ticket at: http://rails.lighthouseapp.com/projects/8994/tickets/6038
Created by y_feldblum (at yahoo) - 2011-02-19 09:28:13 UTC

The following code is in the ActiveRecord readme file:

class CommentObserver < ActiveRecord::Observer
  def after_create(comment) # is called just after Comment#save
    Notifications.deliver_new_comment("david@loudthinking.com", comment)
  end
end

The middle line appears to use the old ActionMailer API, and should be updated to use the new ActionMailer API.