/usr/ is in ruby-htmlentities 4.3.1-1.
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/htmlentities.rb
/usr/lib/ruby/vendor_ruby/htmlentities/
/usr/lib/ruby/vendor_ruby/htmlentities/version.rb
/usr/lib/ruby/vendor_ruby/htmlentities/decoder.rb
/usr/lib/ruby/vendor_ruby/htmlentities/encoder.rb
/usr/lib/ruby/vendor_ruby/htmlentities/flavors.rb
/usr/lib/ruby/vendor_ruby/htmlentities/mappings/
/usr/lib/ruby/vendor_ruby/htmlentities/mappings/expanded.rb
/usr/lib/ruby/vendor_ruby/htmlentities/mappings/html4.rb
/usr/lib/ruby/vendor_ruby/htmlentities/mappings/xhtml1.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-htmlentities/
/usr/share/doc/ruby-htmlentities/copyright
/usr/share/doc/ruby-htmlentities/changelog.Debian.gz