/usr/lib/ruby/ is in ruby-rspec-puppet 2.2.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/rspec-puppet/
/usr/lib/ruby/vendor_ruby/rspec-puppet/example.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/errors.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/example/
/usr/lib/ruby/vendor_ruby/rspec-puppet/example/define_example_group.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/example/class_example_group.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/example/host_example_group.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/example/function_example_group.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/parameter_matcher.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/create_generic.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/dynamic_matchers.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/include_class.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/compile.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/count_generic.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/matchers/run.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/setup.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/coverage.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet/support.rb
/usr/lib/ruby/vendor_ruby/rspec-puppet.rb