Refactor hash creation in routeset

actionpack/lib/action_dispatch/routing/route_set.rb

@@ -98,6 +98,7 @@ def initialize
           @helpers = []
           @module  = Module.new do
             protected
+
             def handle_positional_args(args, options, route)
               inner_options = args.extract_options!
               result = options.dup
@@ -108,7 +109,7 @@ def handle_positional_args(args, options, route)
                   keys -= self.url_options.keys if self.respond_to?(:url_options)
                   keys -= options.keys
                 end
-                result.merge!(Hash[args.zip(keys).map { |v, k| [k, v] }])
+                result.merge!(Hash[keys.zip(args)])
               end
 
               result.merge!(inner_options)