code: func (c *Cell) LineWidth() uint {
  	width := 0
  	for _, s := range strings.Split(c.String(), "\n") {
  		w := runewidth.StringWidth(s)
  		if w > width {
  			width = w
  		}
  	}
  	return uint(width)
  }
docs: // LineWidth returns the max width of all the lines in a cell