code: function formatBufferUncolored(err, options) {
      // istanbul ignore else
      if (!hex) {
          return err.buffer.toString('hex');
      }
  
      options = options || {};
  
      var hasOffset = !(err.offset === undefined || err.offset === null);
      var hasEnd = !(err.endOffset === undefined || err.endOffset === null);
      var markStart = options.markStart || '>';
      var markEnd = options.markEnd || '<';
      var accum = 0;
  
      var opts = options.hexerOptions ? Object.create(options.hexerOptions) : {};
      if (hasOffset) {
          opts.groupSeparator = '';
          if (hasEnd) {
              opts.decorateHexen = decorateRangedError;
          } else {
              opts.decorateHexen = decorateError;
          }
      }
      return hex(err.buffer, opts);
  
      // TODO: suspected broken across lines, should either test and complete or
      // use some sort of alternate notation such as interstitial lines
      function decorateRangedError(totalOffset, screenOffset, hexen) {
          var s;
          if (totalOffset === err.offset) {
              accum = 1;
              s = markStart + hexen;
              if (totalOffset === err.endOffset-1) {
                  s += markEnd;
                  accum = 0;
              } else {
                  s = ' ' + s;
              }
              return s;
          } else if (totalOffset === err.endOffset-1) {
              s = hexen + markEnd;
              while (accum-- > 0) s += ' ';
              accum = 0;
              return s;
          } else if (accum) {
              accum += 2;
              return hexen;
          } else {
              return ' ' + hexen + ' ';
          }
      }
  
      function decorateError(totalOffset, screenOffset, hexen) {
          if (totalOffset === err.offset) {
              return markStart + hexen + markEnd;
          } else {
              return ' ' + hexen + ' ';
          }
      }
  }
docs: istanbul ignore next TODO