/usr/ is in ruby-parser 3.2.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/bin/
/usr/bin/ruby_parse
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/ruby19_parser.rb
/usr/lib/ruby/vendor_ruby/ruby18_parser.rb
/usr/lib/ruby/vendor_ruby/ruby18_parser.y
/usr/lib/ruby/vendor_ruby/ruby20_parser.y
/usr/lib/ruby/vendor_ruby/gauntlet_rubyparser.rb
/usr/lib/ruby/vendor_ruby/ruby_parser.rb
/usr/lib/ruby/vendor_ruby/ruby20_parser.rb
/usr/lib/ruby/vendor_ruby/ruby_lexer.rb
/usr/lib/ruby/vendor_ruby/ruby19_parser.y
/usr/lib/ruby/vendor_ruby/ruby_parser_extras.rb
/usr/share/
/usr/share/man/
/usr/share/man/man1/
/usr/share/man/man1/ruby_parse.1.gz
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/ruby_parser-3.2.2.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/ruby_parser-3.2.2.gemspec
/usr/share/doc/
/usr/share/doc/ruby-parser/
/usr/share/doc/ruby-parser/copyright
/usr/share/doc/ruby-parser/README.txt
/usr/share/doc/ruby-parser/changelog.Debian.gz