func strconv.underscoreOK

3 uses

	strconv (current package)
		atof.go#L303: 	if underscores && !underscoreOK(s[:i]) {
		atoi.go#L152: 	if underscores && !underscoreOK(s0) {
		atoi.go#L264: func underscoreOK(s string) bool {