/usr/lib/ruby/ is in spork 0.9.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/spork/
/usr/lib/ruby/vendor_ruby/spork/app_framework.rb
/usr/lib/ruby/vendor_ruby/spork/test_framework.rb
/usr/lib/ruby/vendor_ruby/spork/ext/
/usr/lib/ruby/vendor_ruby/spork/ext/rails-reloader.rb
/usr/lib/ruby/vendor_ruby/spork/ext/ruby-debug.rb
/usr/lib/ruby/vendor_ruby/spork/diagnoser.rb
/usr/lib/ruby/vendor_ruby/spork/run_strategy.rb
/usr/lib/ruby/vendor_ruby/spork/forker.rb
/usr/lib/ruby/vendor_ruby/spork/run_strategy/
/usr/lib/ruby/vendor_ruby/spork/run_strategy/magazine.rb
/usr/lib/ruby/vendor_ruby/spork/run_strategy/magazine/
/usr/lib/ruby/vendor_ruby/spork/run_strategy/magazine/magazine_slave_provider.rb
/usr/lib/ruby/vendor_ruby/spork/run_strategy/magazine/magazine_slave.rb
/usr/lib/ruby/vendor_ruby/spork/run_strategy/magazine/ring_server.rb
/usr/lib/ruby/vendor_ruby/spork/run_strategy/forking.rb
/usr/lib/ruby/vendor_ruby/spork/test_framework/
/usr/lib/ruby/vendor_ruby/spork/test_framework/cucumber.rb
/usr/lib/ruby/vendor_ruby/spork/test_framework/rspec.rb
/usr/lib/ruby/vendor_ruby/spork/app_framework/
/usr/lib/ruby/vendor_ruby/spork/app_framework/unknown.rb
/usr/lib/ruby/vendor_ruby/spork/app_framework/padrino.rb
/usr/lib/ruby/vendor_ruby/spork/app_framework/rails.rb
/usr/lib/ruby/vendor_ruby/spork/custom_io_streams.rb
/usr/lib/ruby/vendor_ruby/spork/gem_helpers.rb
/usr/lib/ruby/vendor_ruby/spork/server.rb
/usr/lib/ruby/vendor_ruby/spork/runner.rb
/usr/lib/ruby/vendor_ruby/spork.rb