/usr/ is in ruby-cocoon 1.2.6-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/rubygems-integration/all/specifications/
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-cocoon/
/usr/share/doc/ruby-cocoon/changelog.Debian.gz
/usr/share/doc/ruby-cocoon/changelog.gz
/usr/share/doc/ruby-cocoon/README.markdown.gz
/usr/share/doc/ruby-cocoon/copyright
/usr/share/ruby-cocoon/
/usr/share/ruby-cocoon/app/
/usr/share/ruby-cocoon/app/assets/
/usr/share/ruby-cocoon/app/assets/javascripts/
/usr/share/ruby-cocoon/app/assets/javascripts/cocoon.js
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/cocoon-1.2.6.gemspec
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/cocoon/
/usr/lib/ruby/vendor_ruby/cocoon/view_helpers.rb
/usr/lib/ruby/vendor_ruby/generators/
/usr/lib/ruby/vendor_ruby/generators/cocoon/
/usr/lib/ruby/vendor_ruby/generators/cocoon/install/
/usr/lib/ruby/vendor_ruby/generators/cocoon/install/install_generator.rb
/usr/lib/ruby/vendor_ruby/cocoon.rb