const crypto/sha256.chunk

9 uses

	crypto/sha256 (current package)
		sha256.go#L31: 	chunk     = 64
		sha256.go#L53: 	x     [chunk]byte
		sha256.go#L62: 	marshaledSize = len(magic256) + 8*4 + chunk + 8
		sha256.go#L104: 	d.nx = int(d.len % chunk)
		sha256.go#L190: 		if d.nx == chunk {
		sha256.go#L196: 	if len(p) >= chunk {
		sha256.go#L197: 		n := len(p) &^ (chunk - 1)
		sha256block.go#L83: 	for len(p) >= chunk {
		sha256block.go#L124: 		p = p[chunk:]