/usr/ is in ruby-css-parser 1.6.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/css_parser/
/usr/lib/ruby/vendor_ruby/css_parser/parser.rb
/usr/lib/ruby/vendor_ruby/css_parser/regexps.rb
/usr/lib/ruby/vendor_ruby/css_parser/rule_set.rb
/usr/lib/ruby/vendor_ruby/css_parser/version.rb
/usr/lib/ruby/vendor_ruby/css_parser.rb
/usr/share/
/usr/share/doc/ruby-css-parser/
/usr/share/doc/ruby-css-parser/README.md
/usr/share/doc/ruby-css-parser/changelog.Debian.gz
/usr/share/doc/ruby-css-parser/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/css_parser-1.6.0.gemspec