diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 939d546f567aa..8244773877789 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -475,6 +475,7 @@ def initialize(*args) #:nodoc:
         #     scope :module => "admin" do
         #       resources :posts
         #     end
+        #
         # [:path]
         #   If you want to prefix the route, you could use
         #