Redmine

Ruby on Rails appends the "utf8=✓" parameter to form URLs. I propose to remove this parameter by setting config.action_view.default_enforce_utf8 to false.
https://guides.rubyonrails.org/v7.1/configuring.html#config-action-view-default-enforce-utf8

The parameter is added to prevent older versions of Internet Explorer from encoding UTF-8 strings with Latin1. But Microsoft ended the support for Internet Explorer in 2021 and Redmine also dropped support for Internet Explorer in Redmine 5.0 (#34978). So, I believe the "utf8=✓" parameter is no longer necessary.

What is the _snowman param in Ruby on Rails 3 forms for? - Stack Overflow

Removing the "utf8=✓" parameter has the following benefits:

1. URLs will be a bit cleaner
2. The code to handle "utf8=✓" can be removed
3. Problems caused by the parameter such as #31831 will never occur