/usr/lib/ruby/vendor_ruby/ is in ruby-excon 0.31.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/excon/
/usr/lib/ruby/vendor_ruby/excon/standard_instrumentor.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/
/usr/lib/ruby/vendor_ruby/excon/middlewares/instrumentor.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/response_parser.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/mock.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/decompress.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/idempotent.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/base.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/redirect_follower.rb
/usr/lib/ruby/vendor_ruby/excon/middlewares/expects.rb
/usr/lib/ruby/vendor_ruby/excon/socket.rb
/usr/lib/ruby/vendor_ruby/excon/errors.rb
/usr/lib/ruby/vendor_ruby/excon/ssl_socket.rb
/usr/lib/ruby/vendor_ruby/excon/utils.rb
/usr/lib/ruby/vendor_ruby/excon/connection.rb
/usr/lib/ruby/vendor_ruby/excon/unix_socket.rb
/usr/lib/ruby/vendor_ruby/excon/response.rb
/usr/lib/ruby/vendor_ruby/excon/constants.rb
/usr/lib/ruby/vendor_ruby/excon.rb