to_prepare (ActionDispatch::Reloader)

Someone who knows Rails' guts, please confirm that this is wrong (in dev, by default, it runs only on FS change):

Add a prepare callback. Prepare callbacks are run before each request, prior to ActionDispatch::Callback’s before callbacks. Show source # File actionpack/lib/action_dispatch/middleware/reloader.rb, line 34 def self.to_prepare (* args , & block ) set_callback ( :prepare , * args , & block ) end

Full article: http://apidock.com/rails/ActionDispatch/Reloader/to_prepa...