const unicode/utf16.surr2

7 uses

	unicode/utf16 (current package)
		utf16.go#L22: 	surr2 = 0xdc00
		utf16.go#L38: 	if surr1 <= r1 && r1 < surr2 && surr2 <= r2 && r2 < surr3 {
		utf16.go#L39: 		return (r1-surr1)<<10 | (r2 - surr2) + surrSelf
		utf16.go#L52: 	return surr1 + (r>>10)&0x3ff, surr2 + r&0x3ff
		utf16.go#L121: 		case surr1 <= r && r < surr2 && i+1 < len(s) &&
		utf16.go#L122: 			surr2 <= s[i+1] && s[i+1] < surr3: