/usr/ is in ruby-declarative-option 0.1.0-1.
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/declarative/
/usr/lib/ruby/vendor_ruby/declarative/option/
/usr/lib/ruby/vendor_ruby/declarative/option/version.rb
/usr/lib/ruby/vendor_ruby/declarative/option.rb
/usr/lib/ruby/vendor_ruby/declarative/options.rb
/usr/lib/ruby/vendor_ruby/declarative-option.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-declarative-option/
/usr/share/doc/ruby-declarative-option/README.md
/usr/share/doc/ruby-declarative-option/changelog.Debian.gz
/usr/share/doc/ruby-declarative-option/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/declarative-option-0.1.0.gemspec