const unicode/utf8.surrogateMin

4 uses

	unicode/utf8 (current package)
		utf8.go#L24: 	surrogateMin = 0xD800
		utf8.go#L329: 	case surrogateMin <= r && r <= surrogateMax:
		utf8.go#L353: 	case i > MaxRune, surrogateMin <= i && i <= surrogateMax:
		utf8.go#L546: 	case 0 <= r && r < surrogateMin: