/usr/ is in ruby-rabl-rails 0.3.2-1.
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/tasks/
/usr/lib/ruby/vendor_ruby/tasks/rabl-rails.rake
/usr/lib/ruby/vendor_ruby/rabl-rails.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/
/usr/lib/ruby/vendor_ruby/rabl-rails/library.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/renderers/
/usr/lib/ruby/vendor_ruby/rabl-rails/renderers/plist.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/renderers/xml.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/renderers/json.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/renderers/base.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/compiler.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/condition.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/railtie.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/handler.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/renderer.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/version.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/responder.rb
/usr/lib/ruby/vendor_ruby/rabl-rails/template.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/rabl-rails-0.3.2.gemspec
/usr/share/doc/
/usr/share/doc/ruby-rabl-rails/
/usr/share/doc/ruby-rabl-rails/copyright
/usr/share/doc/ruby-rabl-rails/changelog.Debian.gz