/usr/ is in ruby-gelf 1.4.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/gelf.rb
/usr/lib/ruby/vendor_ruby/gelf/
/usr/lib/ruby/vendor_ruby/gelf/logger.rb
/usr/lib/ruby/vendor_ruby/gelf/notifier.rb
/usr/lib/ruby/vendor_ruby/gelf/ruby_sender.rb
/usr/lib/ruby/vendor_ruby/gelf/severity.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-gelf/
/usr/share/doc/ruby-gelf/copyright
/usr/share/doc/ruby-gelf/README.rdoc
/usr/share/doc/ruby-gelf/changelog.Debian.gz
/usr/share/rubygems-integration/all/specifications/gelf-1.4.0.gemspec