code: function getCommentLineNums(comments) {
      const lines = [];
  
      comments.forEach(token => {
          const start = token.loc.start.line;
          const end = token.loc.end.line;
  
          lines.push(start, end);
      });
      return lines;
  }
docs: Return an array with with any line numbers that contain comments.
  @param {Array} comments An array of comment tokens.
  @returns {Array} An array of line numbers.