Don't print trailing commas

strandstring/strandstring.pde

@@ -174,9 +174,10 @@ void loop(void) {
     if (!ds.search(addr)) {
         PORTB |= led_pin;
         //put_line(&serial_port, serial_pin_out, "No more addresses.");
-        for (unsigned i = 0; i < n_nodes; ++i) {
         put_float(&serial_port, serial_pin_out, measurements[i]);
+        for (unsigned i = 1; i < n_nodes; ++i) {
             put_string(&serial_port, serial_pin_out, ", ");
+            put_float(&serial_port, serial_pin_out, measurements[i]);
         }
         put_char(&serial_port, serial_pin_out, '\n');