Fix typo in route description

app/controllers/devise/registrations_controller.rb

@@ -4,7 +4,7 @@ class Devise::RegistrationsController < ApplicationController
   before_filter :require_no_authentication, :only => [ :new, :create ]
   before_filter :authenticate_scope!, :only => [:edit, :update, :destroy]
 
-  # GET /resource/sign_in
+  # GET /resource/sign_up
   def new
     build_resource
     render_with_scope :new
@@ -54,4 +54,4 @@ class Devise::RegistrationsController < ApplicationController
       send(:"authenticate_#{resource_name}!")
       self.resource = send(:"current_#{resource_name}")
     end
-end
+end