Update longer (500 chars) cmd

app.py

@@ -1,5 +1,7 @@
 """Talk to spaces VM via subprocess.check_output."""
 # pylint: disable=wrong-import-position
+
+from typing import Optional, Tuple
 import sys
 from pathlib import Path
 if "." not in sys.path:
@@ -29,7 +31,7 @@ logzero.loglevel()  # default to 10
 
 
 # def greet(command):
-def process(command):
+def process(command) -> Tuple[str, Optional[str]]:
     """Probe vm."""
     # single line: command
     # logger.info("input:\n\t %s", command)