Typo in comment fixed.

demo/microcom.py

@@ -23,7 +23,7 @@ while x.loop():
         # Exit once the user hits Ctrl-].
         break
     elif x.re(user, "(?s)."):
-        # Anything else is sent to the seiral port.
+        # Anything else is sent to the serial port.
         port.send(user.consumed)
     elif x.re(port, "(?s)..*"):
         # Anything that arrives from the serial port is sent to the