fix: added back stricter check

adding the [] check to pass tests/test_cli.py::test_edit_move

Author: 0styx0

todoman/cli.py

@@ -421,7 +421,7 @@ def edit(ctx, id, todo_properties, interactive, raw):
 
     changes = False
     for key, value in todo_properties.items():
-        if value:
+        if value is not None and value != []:
             changes = True
             setattr(todo, key, value)