Show middleware classes on /rails/info/properties

Closes #21230 by following the indication of @rafaelfranca:

> I think the output change would be simpler.
> What is really important to show is the class of the middleware, so we should change the output to show that.

1 files changed, 5 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/stack.rb b/actionpack/lib/action_dispatch/middleware/stack.rb
index 90e2ae6802..44fc1ee736 100644
--- a/actionpack/lib/action_dispatch/middleware/stack.rb
+++ b/actionpack/lib/action_dispatch/middleware/stack.rb
@@ -15,7 +15,11 @@ module ActionDispatch
       def name; klass.name; end
 
       def inspect
-        klass.to_s
+        if klass.is_a?(Class)
+          klass.to_s
+        else
+          klass.class.to_s
+        end
       end
 
       def build(app)