/usr/ is in ruby-turbolinks 2.5.3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/ruby-turbolinks/
/usr/share/ruby-turbolinks/lib/
/usr/share/ruby-turbolinks/lib/assets/
/usr/share/ruby-turbolinks/lib/assets/javascripts/
/usr/share/ruby-turbolinks/lib/assets/javascripts/turbolinks.js.coffee
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/turbolinks-2.5.3.gemspec
/usr/share/doc/
/usr/share/doc/ruby-turbolinks/
/usr/share/doc/ruby-turbolinks/README.md.gz
/usr/share/doc/ruby-turbolinks/copyright
/usr/share/doc/ruby-turbolinks/changelog.Debian.gz
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/turbolinks.rb
/usr/lib/ruby/vendor_ruby/turbolinks/
/usr/lib/ruby/vendor_ruby/turbolinks/xhr_headers.rb
/usr/lib/ruby/vendor_ruby/turbolinks/redirection.rb
/usr/lib/ruby/vendor_ruby/turbolinks/cookies.rb
/usr/lib/ruby/vendor_ruby/turbolinks/xhr_url_for.rb
/usr/lib/ruby/vendor_ruby/turbolinks/x_domain_blocker.rb
/usr/lib/ruby/vendor_ruby/turbolinks/version.rb