func (buf *buffer) twoDigits(i, d int) {
	buf.tmp[i+1] = digits[d%10]
	d /= 10
	buf.tmp[i] = digits[d%10]
}
func (buf *buffer) twoDigits(i, d int) {
	buf.tmp[i+1] = digits[d%10]
	d /= 10
	buf.tmp[i] = digits[d%10]
}
func ( buf * buffer ) twoDigits ( i , d int ) { buf . tmp [ i + 1 ] = digits [ d % 10 ] d /= 10 buf . tmp [ i ] = digits [ d % 10 ] }
// twoDigits formats a zero-prefixed two-digit integer at buf.tmp[i].
twoDigits formats a zero - prefixed two - digit integer at buf . tmp [ i ] .