code: function println(format, varArgs) {
    var vargs = Array.from(arguments);
    vargs[0] += '\n';
    process.stdout.write(sprintf.apply(null, vargs));
  }
docs: Writes newline-terminated formatted string to reporter output stream.
  
  @private
  @param {string} format - `printf`-like format string
  @param {...*} [varArgs] - Format string arguments