/usr/lib/ruby/ is in ruby-asana 0.4.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/templates/
/usr/lib/ruby/vendor_ruby/templates/index.js
/usr/lib/ruby/vendor_ruby/templates/resource.ejs
/usr/lib/ruby/vendor_ruby/asana/
/usr/lib/ruby/vendor_ruby/asana/http_client.rb
/usr/lib/ruby/vendor_ruby/asana/resources.rb
/usr/lib/ruby/vendor_ruby/asana/authentication/
/usr/lib/ruby/vendor_ruby/asana/authentication/oauth2/
/usr/lib/ruby/vendor_ruby/asana/authentication/oauth2/access_token_authentication.rb
/usr/lib/ruby/vendor_ruby/asana/authentication/oauth2/bearer_token_authentication.rb
/usr/lib/ruby/vendor_ruby/asana/authentication/oauth2/client.rb
/usr/lib/ruby/vendor_ruby/asana/authentication/token_authentication.rb
/usr/lib/ruby/vendor_ruby/asana/authentication/oauth2.rb
/usr/lib/ruby/vendor_ruby/asana/ruby2_0_0_compatibility.rb
/usr/lib/ruby/vendor_ruby/asana/resources/
/usr/lib/ruby/vendor_ruby/asana/resources/project.rb
/usr/lib/ruby/vendor_ruby/asana/resources/story.rb
/usr/lib/ruby/vendor_ruby/asana/resources/user.rb
/usr/lib/ruby/vendor_ruby/asana/resources/workspace.rb
/usr/lib/ruby/vendor_ruby/asana/resources/attachment.rb
/usr/lib/ruby/vendor_ruby/asana/resources/task.rb
/usr/lib/ruby/vendor_ruby/asana/resources/tag.rb
/usr/lib/ruby/vendor_ruby/asana/resources/team.rb
/usr/lib/ruby/vendor_ruby/asana/errors.rb
/usr/lib/ruby/vendor_ruby/asana/authentication.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/
/usr/lib/ruby/vendor_ruby/asana/resource_includes/registry.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/collection.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/event.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/attachment_uploading.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/events.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/resource.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/event_subscription.rb
/usr/lib/ruby/vendor_ruby/asana/resource_includes/response_helper.rb
/usr/lib/ruby/vendor_ruby/asana/client/
/usr/lib/ruby/vendor_ruby/asana/client/configuration.rb
/usr/lib/ruby/vendor_ruby/asana/http_client/
/usr/lib/ruby/vendor_ruby/asana/http_client/environment_info.rb
/usr/lib/ruby/vendor_ruby/asana/http_client/error_handling.rb
/usr/lib/ruby/vendor_ruby/asana/http_client/response.rb
/usr/lib/ruby/vendor_ruby/asana/version.rb
/usr/lib/ruby/vendor_ruby/asana/client.rb
/usr/lib/ruby/vendor_ruby/asana.rb