[ruby/pp] Suppress warnings in test on Ruby 2.7
TODO: Revert when dropping Ruby 2.7 support.
https://github.com/ruby/pp/commit/feb417e152
Added by
[ruby/pp] Suppress warnings in test on Ruby 2.7
TODO: Revert when dropping Ruby 2.7 support.
https://github.com/ruby/pp/commit/feb417e152