code: function computeLineLength(line, tabWidth) {
              let extraCharacterCount = 0;
  
              line.replace(/\t/gu, (match, offset) => {
                  const totalOffset = offset + extraCharacterCount,
                      previousTabStopOffset = tabWidth ? totalOffset % tabWidth : 0,
                      spaceCount = tabWidth - previousTabStopOffset;
  
                  extraCharacterCount += spaceCount - 1; // -1 for the replaced tab
              });
              return Array.from(line).length + extraCharacterCount;
          }
docs: Computes the length of a line that may contain tabs. The width of each
  tab will be the number of spaces to the next tab stop.
  @param {string} line The line.
  @param {int} tabWidth The width of each tab stop in spaces.
  @returns {int} The computed line length.
  @private