           <li><a href="#while-vs-if">while vs. if</a></li>
              <li><a href="#parentheses">Parentheses</a></li>
            </ul>
            <li><a href="#comments">Comments</a></li>
            <ul>
              <li><a href="#docstrings">Docstrings</a></li>
              <li><a href="#remove-commented-out-code">Remove commented-out code</a></li>
              <li><a href="#unnecessary-comments">Unnecessary comments</a></li>
            </ul>
            <li><a href="#repetition">Repetition</a><