[ruby/forwardable] Remove string allocation in def_{instance,single}_delegators
https://github.com/ruby/forwardable/commit/1a994c90e1
[ruby/forwardable] Remove string allocation in def_{instance,single}_delegators
https://github.com/ruby/forwardable/commit/1a994c90e1