/usr/ is in ruby-appraisal 0.5.1-2.
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/appraisal/
/usr/lib/ruby/vendor_ruby/appraisal/appraisal.rb
/usr/lib/ruby/vendor_ruby/appraisal/command.rb
/usr/lib/ruby/vendor_ruby/appraisal/dependency.rb
/usr/lib/ruby/vendor_ruby/appraisal/file.rb
/usr/lib/ruby/vendor_ruby/appraisal/gemfile.rb
/usr/lib/ruby/vendor_ruby/appraisal/gemspec.rb
/usr/lib/ruby/vendor_ruby/appraisal/task.rb
/usr/lib/ruby/vendor_ruby/appraisal/version.rb
/usr/lib/ruby/vendor_ruby/appraisal.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-appraisal/
/usr/share/doc/ruby-appraisal/CONTRIBUTING.md
/usr/share/doc/ruby-appraisal/README.md
/usr/share/doc/ruby-appraisal/changelog.Debian.gz
/usr/share/doc/ruby-appraisal/copyright
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/ruby-appraisal
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/appraisal-0.5.1.gemspec