/usr/ is in ruby-filepath 0.6-3.
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/filepath.rb
/usr/lib/ruby/vendor_ruby/filepath/
/usr/lib/ruby/vendor_ruby/filepath/filepathlist.rb
/usr/lib/ruby/vendor_ruby/filepath/filepath.rb
/usr/lib/ruby/vendor_ruby/filepath/core_ext/
/usr/lib/ruby/vendor_ruby/filepath/core_ext/string.rb
/usr/lib/ruby/vendor_ruby/filepath/core_ext/array.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-filepath/
/usr/share/doc/ruby-filepath/README.md
/usr/share/doc/ruby-filepath/copyright
/usr/share/doc/ruby-filepath/changelog.Debian.gz
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/filepath-0.6.gemspec