Fix formatting

tests/test_matcher.py

@@ -51,10 +51,10 @@ def test_eq_and(raw, config, expected):
         ),
         (
             {"vendor": "Eltex", "image": "_image.bin"},
-            {"image": {"$regex": "^\S+"}, "vendor": "Eltex"},
+            {"image": {"$regex": r"^\S+"}, "vendor": "Eltex"},
             True,
         ),
-        ({"vendor": "Eltex"}, {"image": {"$regex": "^\S+"}, "vendor": "Eltex"}, False),
+        ({"vendor": "Eltex"}, {"image": {"$regex": r"^\S+"}, "vendor": "Eltex"}, False),
     ],
 )
 def test_regex(raw, config, expected):