Fix generating urls with mounted helpers in view context

There were actually 2 problems with this one:
* script_name was added to options as a string and then it was used
  in RouteSet#url_for with usage of <<, which was changing the original
  script_name
* the second issue was with _with_routes method. It was called in RoutesProxy
  to modify _routes in view_context, but url_helpers in views is just delegating
  it to controller, so another _with_routes call is needed there

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index c67b0199ce..6e7e133cc5 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -307,7 +307,7 @@ module ActionDispatch
         routes = self
         MountedHelpers.class_eval do
           define_method "_#{name}" do
-            RoutesProxy.new(routes, (self.respond_to?(:controller) ? controller : self))
+            RoutesProxy.new(routes, self)
           end
         end