more explanations on the prints

README.md

@@ -82,7 +82,7 @@ print(values) # prints {2: 1, 6: 0, 15: 1}
 By default, print statements from the device are relayed and displayed as:
 
 ```txt
-MPY_PRINT@COM1:HELLO WORLD
+MPY_PRINT@COM1:hello world!
 ```
 
 These messages can be suppressed by passing `show_prints=False` when instantiating the device.