/usr/lib/ruby/vendor_ruby/ is in ruby-shoulda-context 1.2.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/shoulda/
/usr/lib/ruby/vendor_ruby/shoulda/context.rb
/usr/lib/ruby/vendor_ruby/shoulda/context/
/usr/lib/ruby/vendor_ruby/shoulda/context/context.rb
/usr/lib/ruby/vendor_ruby/shoulda/context/tasks/
/usr/lib/ruby/vendor_ruby/shoulda/context/tasks/list_tests.rake
/usr/lib/ruby/vendor_ruby/shoulda/context/tasks/yaml_to_shoulda.rake
/usr/lib/ruby/vendor_ruby/shoulda/context/autoload_macros.rb
/usr/lib/ruby/vendor_ruby/shoulda/context/proc_extensions.rb
/usr/lib/ruby/vendor_ruby/shoulda/context/assertions.rb
/usr/lib/ruby/vendor_ruby/shoulda/context/test_framework_detection.rb
/usr/lib/ruby/vendor_ruby/shoulda/context/version.rb
/usr/lib/ruby/vendor_ruby/shoulda/context/tasks.rb
/usr/lib/ruby/vendor_ruby/shoulda-context.rb