/usr/ is in ruby-generator-spec 0.9.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/generator_spec/
/usr/lib/ruby/vendor_ruby/generator_spec/version.rb
/usr/lib/ruby/vendor_ruby/generator_spec/matcher.rb
/usr/lib/ruby/vendor_ruby/generator_spec/test_case.rb
/usr/lib/ruby/vendor_ruby/generator_spec/generator_example_group.rb
/usr/lib/ruby/vendor_ruby/generator_spec.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-generator-spec/
/usr/share/doc/ruby-generator-spec/copyright
/usr/share/doc/ruby-generator-spec/changelog.Debian.gz
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/generator_spec-0.9.3.gemspec