/usr/ is in ruby-test-xml 0.1.8-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/test_xml/
/usr/lib/ruby/vendor_ruby/test_xml/assertions.rb
/usr/lib/ruby/vendor_ruby/test_xml/matcher_methods.rb
/usr/lib/ruby/vendor_ruby/test_xml/mini_test.rb
/usr/lib/ruby/vendor_ruby/test_xml/nokogiri/
/usr/lib/ruby/vendor_ruby/test_xml/nokogiri/node.rb
/usr/lib/ruby/vendor_ruby/test_xml/nokogiri.rb
/usr/lib/ruby/vendor_ruby/test_xml/spec.rb
/usr/lib/ruby/vendor_ruby/test_xml/test_unit.rb
/usr/lib/ruby/vendor_ruby/test_xml/version.rb
/usr/lib/ruby/vendor_ruby/test_xml.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-test-xml/
/usr/share/doc/ruby-test-xml/README.rdoc
/usr/share/doc/ruby-test-xml/changelog.Debian.gz
/usr/share/doc/ruby-test-xml/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/test_xml-0.1.8.gemspec