style: add copyright header

james-garner-canonical · james-garner-canonical · commit ab7d3402cf6e · 2024-10-15T14:26:38.000+13:00
diff --git a/tests/validate/test_facades.py b/tests/validate/test_facades.py
@@ -1,3 +1,6 @@
+# Copyright 2023 Canonical Ltd.
+# Licensed under the Apache V2, see LICENCE file for details.
+
 import importlib
 import re
 import warnings
