/usr/ is in ruby-twitter-stream 0.1.16-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-twitter-stream/
/usr/share/doc/ruby-twitter-stream/README.markdown
/usr/share/doc/ruby-twitter-stream/examples/
/usr/share/doc/ruby-twitter-stream/examples/reader.rb
/usr/share/doc/ruby-twitter-stream/copyright
/usr/share/doc/ruby-twitter-stream/changelog.Debian.gz
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/twitter-stream-0.1.16.gemspec
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/twitter/
/usr/lib/ruby/vendor_ruby/twitter/json_stream.rb