/usr/lib/ruby/vendor_ruby/action_controller/templates/ is in ruby-actionpack-2.3 2.3.14-5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/_request_and_response.erb
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/_trace.erb
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/diagnostics.erb
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/layout.erb
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/missing_template.erb
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/routing_error.erb
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/template_error.erb
/usr/lib/ruby/vendor_ruby/action_controller/templates/rescues/unknown_action.erb