Git loose objects - Experimental format header vs Gzip header checksum

gistfile1.scala

// 0ttt1000
// 0iii1000

def monkey(t: Int, w: Int) = (t<<12) + (8<<8) + (w << 4) + (8)


for (t <- 1 to 4; windowBit <- 0 to 7) {
        val header = monkey(t,windowBit)
	println(t, windowBit, header, "%04X" format header, header % 31 == 0)
}