drawBottom(drawRight) {
    let left = this.chars[this.x == 0 ? 'bottomLeft' : 'bottomMid'];
    let content = utils.repeat(this.chars.bottom, this.width);
    let right = drawRight ? this.chars['bottomRight'] : '';
    return this.wrapWithStyleColors('border', left + content + right);
  }
Renders the bottom line of the cell.
@param drawRight - true if this method should render the right edge of the cell.
@returns {String}