/usr/ is in ruby-mixlib-log 1.6.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-mixlib-log/
/usr/share/doc/ruby-mixlib-log/changelog.Debian.gz
/usr/share/doc/ruby-mixlib-log/copyright
/usr/share/doc/ruby-mixlib-log/README.rdoc
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/mixlib-log-1.6.0.gemspec
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/mixlib/
/usr/lib/ruby/vendor_ruby/mixlib/log.rb
/usr/lib/ruby/vendor_ruby/mixlib/log/
/usr/lib/ruby/vendor_ruby/mixlib/log/version.rb
/usr/lib/ruby/vendor_ruby/mixlib/log/formatter.rb