const time.lowerhex

3 uses

	time (current package)
		format.go#L844: 	lowerhex  = "0123456789abcdef"
		format.go#L871: 				buf = append(buf, lowerhex[s[i+j]>>4])
		format.go#L872: 				buf = append(buf, lowerhex[s[i+j]&0xF])