code: func stringWidth(text string) (width int) {
  	g := uniseg.NewGraphemes(text)
  	for g.Next() {
  		var chWidth int
  		for _, r := range g.Runes() {
  			chWidth = runewidth.RuneWidth(r)
  			if chWidth > 0 {
  				break // Our best guess at this point is to use the width of the first non-zero-width rune.
  			}
  		}
  		width += chWidth
  	}
  	return
  }
docs: // stringWidth returns the number of horizontal cells needed to print the given
  // text. It splits the text into its grapheme clusters, calculates each
  // cluster's width, and adds them up to a total.