[ruby-core:115764] [Ruby master Feature#20069] Buffer class in stdlib

Issue #20069 has been reported by pynix (Pynix wang). ---------------------------------------- Feature #20069: Buffer class in stdlib https://bugs.ruby-lang.org/issues/20069 * Author: pynix (Pynix wang) * Status: Open * Priority: Normal ---------------------------------------- ruby use `String` to deal with bytes, this cause error on irb "invalid byte sequence in utf-8" can we get a builtin class like Buffer or Bytes that represent as hex string -- https://bugs.ruby-lang.org/