Only merge params option if params is a Hash in url_for helper

Author: chaymaeBZ

actionpack/lib/action_dispatch/routing/route_set.rb

@@ -822,7 +822,7 @@ def url_for(options, route_name = nil, url_strategy = UNKNOWN, method_name = nil
         path = route_with_params.path(method_name)
         params = route_with_params.params
 
-        if options.key? :params
+        if options[:params].is_a?(Hash)
           params.merge! options[:params]
         end