/usr/ is in ruby-nested-form 0.3.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/
/usr/lib/ruby/vendor_ruby/nested_form.rb
/usr/lib/ruby/vendor_ruby/generators/
/usr/lib/ruby/vendor_ruby/generators/nested_form/
/usr/lib/ruby/vendor_ruby/generators/nested_form/install_generator.rb
/usr/lib/ruby/vendor_ruby/nested_form/
/usr/lib/ruby/vendor_ruby/nested_form/builder_mixin.rb
/usr/lib/ruby/vendor_ruby/nested_form/view_helper.rb
/usr/lib/ruby/vendor_ruby/nested_form/engine.rb
/usr/lib/ruby/vendor_ruby/nested_form/builders.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-nested-form/
/usr/share/doc/ruby-nested-form/copyright
/usr/share/doc/ruby-nested-form/changelog.gz
/usr/share/doc/ruby-nested-form/TODO.Debian
/usr/share/doc/ruby-nested-form/README.md.gz
/usr/share/doc/ruby-nested-form/changelog.Debian.gz
/usr/share/ruby-nested-form/
/usr/share/ruby-nested-form/vendor/
/usr/share/ruby-nested-form/vendor/assets/
/usr/share/ruby-nested-form/vendor/assets/javascripts/
/usr/share/ruby-nested-form/vendor/assets/javascripts/jquery_nested_form.js
/usr/share/ruby-nested-form/vendor/assets/javascripts/prototype_nested_form.js
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/nested_form-0.3.2.gemspec