minor

isotest/bits/main.v

@@ -33,6 +33,9 @@ fn test_bow() {
 	println("bow new bits volume: ${bow.bits_volume()}")
 	println("bow new volume: ${bow.volume()}")
 
+	// XXX
+	// not bowstring: hemp/fiber
+
 	println("bits: done test_bow")
 }