code: func NewStripForStr(str string) *Strip {
  	return &Strip{
  		Open:  (len(str) > 2) && str[2] == '~',
  		Close: (len(str) > 2) && str[len(str)-3] == '~',
  	}
  }
docs: // NewStripForStr instanciates a Strip for given tag.