OpenSSL::Buffering#gets

# File tmp/rubies/ruby-3.4.1/ext/openssl/lib/openssl/buffering.rb, line 238
def gets(eol=$/, limit=nil, chomp: false)
  idx = @rbuffer.index(eol)
  until @eof
    break if idx
    fill_rbuff
    idx = @rbuffer.index(eol)
  end
  if eol.is_a?(Regexp)
    size = idx ? idx+$&.size : nil
  else
    size = idx ? idx+eol.size : nil
  end
  if size && limit && limit >= 0
    size = [size, limit].min
  end
  line = consume_rbuff(size)
  if chomp && line
    line.chomp!(eol)
  end
  line
end