durafmt.go
func ParseShort(dinput time.Duration) *Durafmt {
	input := dinput.String()
	return &Durafmt{dinput, input, true}
}
func ParseShort(dinput time.Duration) *Durafmt {
	input := dinput.String()
	return &Durafmt{dinput, input, true}
}
// ParseShort creates a new *Durafmt struct, short form, returns error if input is invalid.