/usr/lib/ruby/vendor_ruby/faraday/adapter/ is in ruby-faraday 0.9.2-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/faraday/adapter/em_http.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/em_http_ssl_patch.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/em_synchrony/
/usr/lib/ruby/vendor_ruby/faraday/adapter/em_synchrony.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/em_synchrony/parallel_manager.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/excon.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/httpclient.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/net_http.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/net_http_persistent.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/patron.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/rack.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/test.rb
/usr/lib/ruby/vendor_ruby/faraday/adapter/typhoeus.rb