/usr/lib/ruby/ is in ruby-highline 1.7.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/highline/
/usr/lib/ruby/vendor_ruby/highline/simulate.rb
/usr/lib/ruby/vendor_ruby/highline/import.rb
/usr/lib/ruby/vendor_ruby/highline/system_extensions.rb
/usr/lib/ruby/vendor_ruby/highline/string_extensions.rb
/usr/lib/ruby/vendor_ruby/highline/color_scheme.rb
/usr/lib/ruby/vendor_ruby/highline/menu.rb
/usr/lib/ruby/vendor_ruby/highline/version.rb
/usr/lib/ruby/vendor_ruby/highline/question.rb
/usr/lib/ruby/vendor_ruby/highline/style.rb
/usr/lib/ruby/vendor_ruby/highline/compatibility.rb
/usr/lib/ruby/vendor_ruby/highline.rb