do/end does not work in routes

config/routes.rb

@@ -58,9 +58,9 @@ CartoDB::Application.routes.draw do
     end
 
     namespace :editor do
-      match '(*path)', to: redirect do |params, request|
+      match '(*path)', to: redirect { |params, request|
         CartoDB.base_url_from_request(request) + '/builder/' + params[:path].to_s
-      end
+      }
     end
   end