stop using a hash for parameterizing

actionpack/lib/action_dispatch/routing/route_set.rb

@@ -350,8 +350,7 @@ def add_route(app, conditions = {}, requirements = {}, defaults = {}, name = nil
       end
 
       class Generator #:nodoc:
-        PARAMETERIZE = {
-          :parameterize => lambda do |name, value|
+        PARAMETERIZE = lambda do |name, value|
           if name == :controller
             value
           elsif value.is_a?(Array)
@@ -361,7 +360,6 @@ class Generator #:nodoc:
             param.split('/').map { |v| Rack::Mount::Utils.escape_uri(v) }.join("/")
           end
         end
-        }
 
         attr_reader :options, :recall, :set, :named_route