const runtime.t2

3 uses

	runtime (current package)
		utf8.go#L23: 	t2 = 0xC0 // 1100 0000
		utf8.go#L70: 	case t2 <= s[0] && s[0] < t3:
		utf8.go#L112: 		p[0] = t2 | byte(r>>6)