vm/ops.go
func txPrintRaw(st *State) {
	// XXX TODO: mark_raw handling
	arg := st.sa
	if arg == nil {
		st.Warnf("Use of nil to print\n")
	} else {
		st.AppendOutputString(interfaceToString(arg))
	}
	st.Advance()
}
func txPrintRaw(st *State) {
	// XXX TODO: mark_raw handling
	arg := st.sa
	if arg == nil {
		st.Warnf("Use of nil to print\n")
	} else {
		st.AppendOutputString(interfaceToString(arg))
	}
	st.Advance()
}
// Prints the contents of register sa, forcing raw string semantics