/usr/lib/ruby/vendor_ruby/ is in ruby-state-machines 0.4.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/state_machines/
/usr/lib/ruby/vendor_ruby/state_machines/state_context.rb
/usr/lib/ruby/vendor_ruby/state_machines/path_collection.rb
/usr/lib/ruby/vendor_ruby/state_machines/integrations.rb
/usr/lib/ruby/vendor_ruby/state_machines/node_collection.rb
/usr/lib/ruby/vendor_ruby/state_machines/matcher.rb
/usr/lib/ruby/vendor_ruby/state_machines/helper_module.rb
/usr/lib/ruby/vendor_ruby/state_machines/event.rb
/usr/lib/ruby/vendor_ruby/state_machines/core_ext.rb
/usr/lib/ruby/vendor_ruby/state_machines/assertions.rb
/usr/lib/ruby/vendor_ruby/state_machines/macro_methods.rb
/usr/lib/ruby/vendor_ruby/state_machines/core.rb
/usr/lib/ruby/vendor_ruby/state_machines/machine.rb
/usr/lib/ruby/vendor_ruby/state_machines/machine_collection.rb
/usr/lib/ruby/vendor_ruby/state_machines/error.rb
/usr/lib/ruby/vendor_ruby/state_machines/state.rb
/usr/lib/ruby/vendor_ruby/state_machines/core_ext/
/usr/lib/ruby/vendor_ruby/state_machines/core_ext/class/
/usr/lib/ruby/vendor_ruby/state_machines/core_ext/class/state_machine.rb
/usr/lib/ruby/vendor_ruby/state_machines/matcher_helpers.rb
/usr/lib/ruby/vendor_ruby/state_machines/path.rb
/usr/lib/ruby/vendor_ruby/state_machines/callback.rb
/usr/lib/ruby/vendor_ruby/state_machines/eval_helpers.rb
/usr/lib/ruby/vendor_ruby/state_machines/extensions.rb
/usr/lib/ruby/vendor_ruby/state_machines/integrations/
/usr/lib/ruby/vendor_ruby/state_machines/integrations/base.rb
/usr/lib/ruby/vendor_ruby/state_machines/branch.rb
/usr/lib/ruby/vendor_ruby/state_machines/event_collection.rb
/usr/lib/ruby/vendor_ruby/state_machines/version.rb
/usr/lib/ruby/vendor_ruby/state_machines/transition_collection.rb
/usr/lib/ruby/vendor_ruby/state_machines/transition.rb
/usr/lib/ruby/vendor_ruby/state_machines/state_collection.rb
/usr/lib/ruby/vendor_ruby/state_machines.rb