Redmine

relates to #32913

this prevents double escaping, fixes

WikiControllerTest#test_show_filename_should_be_uri_encoded_for_ms_browsers [/redmine/test/functional/wiki_controller_test.rb:1146]:
--- expected
+++ actual
@@ -1 +1 @@
-"attachment; filename=\"Этика_менеджмента.pdf\"" 
+"attachment; filename=\"%3F%3F%3F%3F%3F_%3F%3F%3F%3F%3F%3F%3F%3F%3F%3F%3F.pdf\"; filename*=UTF-8''%D0%AD%D1%82%D0%B8%D0%BA%D0%B0_%D0%BC%D0%B5%D0%BD%D0%B5%D0%B4%D0%B6%D0%BC%D0%B5%D0%BD%D1%82%D0%B0.pdf" 

Rails 6 escapes filenames per RFC 2231 for all browsers https://github.com/rails/rails/commit/890485cfce4c361c03a41ec23b0ba187007818cc

#filename_for_content_disposition just returns the original name for compatibility reasons, but if we don't care, we can just remove the method