/usr/lib/ruby/vendor_ruby/ is in ruby-httparty 0.12.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/httparty/
/usr/lib/ruby/vendor_ruby/httparty/module_inheritable_attributes.rb
/usr/lib/ruby/vendor_ruby/httparty/core_extensions.rb
/usr/lib/ruby/vendor_ruby/httparty/request.rb
/usr/lib/ruby/vendor_ruby/httparty/net_digest_auth.rb
/usr/lib/ruby/vendor_ruby/httparty/connection_adapter.rb
/usr/lib/ruby/vendor_ruby/httparty/exceptions.rb
/usr/lib/ruby/vendor_ruby/httparty/response.rb
/usr/lib/ruby/vendor_ruby/httparty/hash_conversions.rb
/usr/lib/ruby/vendor_ruby/httparty/cookie_hash.rb
/usr/lib/ruby/vendor_ruby/httparty/parser.rb
/usr/lib/ruby/vendor_ruby/httparty/logger/
/usr/lib/ruby/vendor_ruby/httparty/logger/apache_logger.rb
/usr/lib/ruby/vendor_ruby/httparty/logger/logger.rb
/usr/lib/ruby/vendor_ruby/httparty/logger/curl_logger.rb
/usr/lib/ruby/vendor_ruby/httparty/response/
/usr/lib/ruby/vendor_ruby/httparty/response/headers.rb
/usr/lib/ruby/vendor_ruby/httparty/version.rb
/usr/lib/ruby/vendor_ruby/httparty.rb