/usr/lib/ is in ruby-jquery-atwho-rails 1.3.2-2.
This file is owned by root:root, with mode 0o755.
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/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/generators/
/usr/lib/ruby/vendor_ruby/generators/atwho/
/usr/lib/ruby/vendor_ruby/generators/atwho/install_generator.rb
/usr/lib/ruby/vendor_ruby/jquery-atwho-rails/
/usr/lib/ruby/vendor_ruby/jquery-atwho-rails/version.rb
/usr/lib/ruby/vendor_ruby/assets/
/usr/lib/ruby/vendor_ruby/assets/stylesheets/
/usr/lib/ruby/vendor_ruby/assets/stylesheets/jquery.atwho.css
/usr/lib/ruby/vendor_ruby/assets/javascripts/
/usr/lib/ruby/vendor_ruby/assets/javascripts/jquery.atwho/
/usr/lib/ruby/vendor_ruby/assets/javascripts/jquery.atwho/jquery.caret.js
/usr/lib/ruby/vendor_ruby/assets/javascripts/jquery.atwho/index.js
/usr/lib/ruby/vendor_ruby/assets/javascripts/jquery.atwho/jquery.atwho.js
/usr/lib/ruby/vendor_ruby/jquery-atwho-rails.rb