/usr/lib/ruby/ is in ruby-simple-navigation 3.11.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/simple-navigation.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/
/usr/lib/ruby/vendor_ruby/simple_navigation/core.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/adapters/
/usr/lib/ruby/vendor_ruby/simple_navigation/adapters/rails.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/adapters/padrino.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/adapters/sinatra.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/adapters/nanoc.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/adapters/base.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/core/
/usr/lib/ruby/vendor_ruby/simple_navigation/core/item.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/core/item_container.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/core/items_provider.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/core/configuration.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/core/item_adapter.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rails_controller_methods.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/adapters.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/renderer/
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/renderer/breadcrumbs.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/renderer/list.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/renderer/links.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/renderer/base.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/renderer/text.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/renderer/json.rb
/usr/lib/ruby/vendor_ruby/simple_navigation/rendering/helpers.rb
/usr/lib/ruby/vendor_ruby/generators/
/usr/lib/ruby/vendor_ruby/generators/navigation_config/
/usr/lib/ruby/vendor_ruby/generators/navigation_config/navigation_config_generator.rb
/usr/lib/ruby/vendor_ruby/simple_navigation.rb