code: function printTotalScore(currentScore, addition) {
    if (currentScore === 0) {
      printLine(`Total Score: ${addition.toString()}`);
    } else {
      printLine(
        `Total Score: ${currentScore} + ${addition} = ${currentScore + addition}`,
      );
    }
  }
docs: Prints the total score as the sum of the current score and the addition.
  
  If the current score is zero, just the addition and not the sum will be
  printed.
  
  @param {number} currentScore The current score.
  @param {number} addition The score to add to the current score.