it appears routes can be reloaded in dev under certain conditions

Author: SamSaffron

config/routes.rb

@@ -4,7 +4,7 @@
 
 # This used to be User#username_format, but that causes a preload of the User object
 # and makes Guard not work properly.
-USERNAME_ROUTE_FORMAT = /[A-Za-z0-9\_]+/
+USERNAME_ROUTE_FORMAT = /[A-Za-z0-9\_]+/ unless defined? USERNAME_ROUTE_FORMAT
 
 Discourse::Application.routes.draw do