Say ‘hello’

(ENV38) $ rshell -p /dev/cu.SLAB_USBtoUART
> repl
Entering REPL. Use Control-X to exit.
repl_serial_to_stdout dev = <rshell.main.DeviceSerial object at 0x102c7e908>>
>>> help()
[...]
>>> print ("Hello FortiThing!")
Hello FortiThing!