/usr/lib/ruby/ is in ruby-http 1.0.2-2ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/http/
/usr/lib/ruby/vendor_ruby/http/request.rb
/usr/lib/ruby/vendor_ruby/http/request/
/usr/lib/ruby/vendor_ruby/http/request/writer.rb
/usr/lib/ruby/vendor_ruby/http/options.rb
/usr/lib/ruby/vendor_ruby/http/chainable.rb
/usr/lib/ruby/vendor_ruby/http/response/
/usr/lib/ruby/vendor_ruby/http/response/status/
/usr/lib/ruby/vendor_ruby/http/response/status/reasons.rb
/usr/lib/ruby/vendor_ruby/http/response/parser.rb
/usr/lib/ruby/vendor_ruby/http/response/status.rb
/usr/lib/ruby/vendor_ruby/http/response/body.rb
/usr/lib/ruby/vendor_ruby/http/errors.rb
/usr/lib/ruby/vendor_ruby/http/connection.rb
/usr/lib/ruby/vendor_ruby/http/headers.rb
/usr/lib/ruby/vendor_ruby/http/uri.rb
/usr/lib/ruby/vendor_ruby/http/redirector.rb
/usr/lib/ruby/vendor_ruby/http/mime_type/
/usr/lib/ruby/vendor_ruby/http/mime_type/adapter.rb
/usr/lib/ruby/vendor_ruby/http/mime_type/json.rb
/usr/lib/ruby/vendor_ruby/http/timeout/
/usr/lib/ruby/vendor_ruby/http/timeout/null.rb
/usr/lib/ruby/vendor_ruby/http/timeout/per_operation.rb
/usr/lib/ruby/vendor_ruby/http/timeout/global.rb
/usr/lib/ruby/vendor_ruby/http/mime_type.rb
/usr/lib/ruby/vendor_ruby/http/version.rb
/usr/lib/ruby/vendor_ruby/http/client.rb
/usr/lib/ruby/vendor_ruby/http/headers/
/usr/lib/ruby/vendor_ruby/http/headers/mixin.rb
/usr/lib/ruby/vendor_ruby/http/headers/known.rb
/usr/lib/ruby/vendor_ruby/http/response.rb
/usr/lib/ruby/vendor_ruby/http/content_type.rb
/usr/lib/ruby/vendor_ruby/http.rb