Ensure diagnostics redaction can handle lists of lists (#65170)

* Ensure diagnostics redaction can handle lists of lists

* Code review

* Update homeassistant/components/diagnostics/util.py

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

* Code review

* Typing

* Revert "Typing"

This reverts commit 8a57f772ca.

* New typing attempt

* Revert "New typing attempt"

This reverts commit e26e4aae69.

* Fix typing

* Fix typing again

* Add tests

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

tests/components/diagnostics/test_util.py

@@ -0,0 +1,33 @@
+"""Test Diagnostics utils."""
+from homeassistant.components.diagnostics import REDACTED, async_redact_data
+
+
+def test_redact():
+    """Test the async_redact_data helper."""
+    data = {
+        "key1": "value1",
+        "key2": ["value2_a", "value2_b"],
+        "key3": [["value_3a", "value_3b"], ["value_3c", "value_3d"]],
+        "key4": {
+            "key4_1": "value4_1",
+            "key4_2": ["value4_2a", "value4_2b"],
+            "key4_3": [["value4_3a", "value4_3b"], ["value4_3c", "value4_3d"]],
+        },
+    }
+
+    to_redact = {
+        "key1",
+        "key3",
+        "key4_1",
+    }
+
+    assert async_redact_data(data, to_redact) == {
+        "key1": REDACTED,
+        "key2": ["value2_a", "value2_b"],
+        "key3": REDACTED,
+        "key4": {
+            "key4_1": REDACTED,
+            "key4_2": ["value4_2a", "value4_2b"],
+            "key4_3": [["value4_3a", "value4_3b"], ["value4_3c", "value4_3d"]],
+        },
+    }