/usr/ is in ruby-chronic-duration 0.10.6-1.
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/chronic_duration/
/usr/lib/ruby/vendor_ruby/chronic_duration/version.rb
/usr/lib/ruby/vendor_ruby/chronic_duration.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-chronic-duration/
/usr/share/doc/ruby-chronic-duration/README.md
/usr/share/doc/ruby-chronic-duration/changelog.Debian.gz
/usr/share/doc/ruby-chronic-duration/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/chronic_duration-0.10.6.gemspec