/usr/lib/ruby/vendor_ruby/ is in ruby-innate 2013.02.21-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/innate/
/usr/lib/ruby/vendor_ruby/innate/adapter.rb
/usr/lib/ruby/vendor_ruby/innate/route.rb
/usr/lib/ruby/vendor_ruby/innate/spec/
/usr/lib/ruby/vendor_ruby/innate/spec/bacon.rb
/usr/lib/ruby/vendor_ruby/innate/action.rb
/usr/lib/ruby/vendor_ruby/innate/trinity.rb
/usr/lib/ruby/vendor_ruby/innate/version.rb
/usr/lib/ruby/vendor_ruby/innate/state/
/usr/lib/ruby/vendor_ruby/innate/state/accessor.rb
/usr/lib/ruby/vendor_ruby/innate/session.rb
/usr/lib/ruby/vendor_ruby/innate/default_middleware.rb
/usr/lib/ruby/vendor_ruby/innate/helper/
/usr/lib/ruby/vendor_ruby/innate/helper/render.rb
/usr/lib/ruby/vendor_ruby/innate/helper/link.rb
/usr/lib/ruby/vendor_ruby/innate/helper/aspect.rb
/usr/lib/ruby/vendor_ruby/innate/helper/flash.rb
/usr/lib/ruby/vendor_ruby/innate/helper/redirect.rb
/usr/lib/ruby/vendor_ruby/innate/helper/cgi.rb
/usr/lib/ruby/vendor_ruby/innate/response.rb
/usr/lib/ruby/vendor_ruby/innate/helper.rb
/usr/lib/ruby/vendor_ruby/innate/options/
/usr/lib/ruby/vendor_ruby/innate/options/stub.rb
/usr/lib/ruby/vendor_ruby/innate/options/dsl.rb
/usr/lib/ruby/vendor_ruby/innate/view.rb
/usr/lib/ruby/vendor_ruby/innate/cache/
/usr/lib/ruby/vendor_ruby/innate/cache/marshal.rb
/usr/lib/ruby/vendor_ruby/innate/cache/drb.rb
/usr/lib/ruby/vendor_ruby/innate/cache/file_based.rb
/usr/lib/ruby/vendor_ruby/innate/cache/memory.rb
/usr/lib/ruby/vendor_ruby/innate/cache/yaml.rb
/usr/lib/ruby/vendor_ruby/innate/cache/api.rb
/usr/lib/ruby/vendor_ruby/innate/request.rb
/usr/lib/ruby/vendor_ruby/innate/traited.rb
/usr/lib/ruby/vendor_ruby/innate/dynamap.rb
/usr/lib/ruby/vendor_ruby/innate/options.rb
/usr/lib/ruby/vendor_ruby/innate/lru_hash.rb
/usr/lib/ruby/vendor_ruby/innate/view/
/usr/lib/ruby/vendor_ruby/innate/view/none.rb
/usr/lib/ruby/vendor_ruby/innate/view/etanni.rb
/usr/lib/ruby/vendor_ruby/innate/view/erb.rb
/usr/lib/ruby/vendor_ruby/innate/log/
/usr/lib/ruby/vendor_ruby/innate/log/color_formatter.rb
/usr/lib/ruby/vendor_ruby/innate/log/hub.rb
/usr/lib/ruby/vendor_ruby/innate/state.rb
/usr/lib/ruby/vendor_ruby/innate/cache.rb
/usr/lib/ruby/vendor_ruby/innate/spec.rb
/usr/lib/ruby/vendor_ruby/innate/current.rb
/usr/lib/ruby/vendor_ruby/innate/session/
/usr/lib/ruby/vendor_ruby/innate/session/flash.rb
/usr/lib/ruby/vendor_ruby/innate/node.rb
/usr/lib/ruby/vendor_ruby/innate/mock.rb
/usr/lib/ruby/vendor_ruby/innate/log.rb
/usr/lib/ruby/vendor_ruby/innate.rb