code: func (t *Tabulate) padRow(arr []string, padding int) []string {
  	if len(arr) < 1 {
  		return arr
  	}
  	padded := make([]string, len(arr))
  	for index, el := range arr {
  		b := createBuffer()
  		b.Write(" ", padding)
  		b.Write(el, 1)
  		b.Write(" ", padding)
  		padded[index] = b.String()
  	}
  	return padded
  }
docs: // Add padding to each cell