/usr/lib/ruby/ is in ruby-mechanize 2.3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/mechanize.rb
/usr/lib/ruby/vendor_ruby/mechanize/
/usr/lib/ruby/vendor_ruby/mechanize/file_response.rb
/usr/lib/ruby/vendor_ruby/mechanize/parser.rb
/usr/lib/ruby/vendor_ruby/mechanize/download.rb
/usr/lib/ruby/vendor_ruby/mechanize/cookie.rb
/usr/lib/ruby/vendor_ruby/mechanize/redirect_not_get_or_head_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/util.rb
/usr/lib/ruby/vendor_ruby/mechanize/unauthorized_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/file_connection.rb
/usr/lib/ruby/vendor_ruby/mechanize/file_saver.rb
/usr/lib/ruby/vendor_ruby/mechanize/response_read_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/file.rb
/usr/lib/ruby/vendor_ruby/mechanize/http/
/usr/lib/ruby/vendor_ruby/mechanize/http/agent.rb
/usr/lib/ruby/vendor_ruby/mechanize/http/auth_challenge.rb
/usr/lib/ruby/vendor_ruby/mechanize/http/auth_realm.rb
/usr/lib/ruby/vendor_ruby/mechanize/http/content_disposition_parser.rb
/usr/lib/ruby/vendor_ruby/mechanize/http/www_authenticate_parser.rb
/usr/lib/ruby/vendor_ruby/mechanize/cookie_jar.rb
/usr/lib/ruby/vendor_ruby/mechanize/page.rb
/usr/lib/ruby/vendor_ruby/mechanize/form.rb
/usr/lib/ruby/vendor_ruby/mechanize/image.rb
/usr/lib/ruby/vendor_ruby/mechanize/history.rb
/usr/lib/ruby/vendor_ruby/mechanize/unsupported_scheme_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/directory_saver.rb
/usr/lib/ruby/vendor_ruby/mechanize/response_code_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/element_matcher.rb
/usr/lib/ruby/vendor_ruby/mechanize/file_request.rb
/usr/lib/ruby/vendor_ruby/mechanize/robots_disallowed_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/page/
/usr/lib/ruby/vendor_ruby/mechanize/page/label.rb
/usr/lib/ruby/vendor_ruby/mechanize/page/frame.rb
/usr/lib/ruby/vendor_ruby/mechanize/page/image.rb
/usr/lib/ruby/vendor_ruby/mechanize/page/base.rb
/usr/lib/ruby/vendor_ruby/mechanize/page/link.rb
/usr/lib/ruby/vendor_ruby/mechanize/page/meta_refresh.rb
/usr/lib/ruby/vendor_ruby/mechanize/monkey_patch.rb
/usr/lib/ruby/vendor_ruby/mechanize/redirect_limit_reached_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/pluggable_parsers.rb
/usr/lib/ruby/vendor_ruby/mechanize/test_case.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/
/usr/lib/ruby/vendor_ruby/mechanize/form/multi_select_list.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/option.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/check_box.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/field.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/submit.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/file_upload.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/select_list.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/hidden.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/image_button.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/radio_button.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/text.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/keygen.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/reset.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/button.rb
/usr/lib/ruby/vendor_ruby/mechanize/form/textarea.rb
/usr/lib/ruby/vendor_ruby/mechanize/http.rb
/usr/lib/ruby/vendor_ruby/mechanize/content_type_error.rb
/usr/lib/ruby/vendor_ruby/mechanize/headers.rb