style(litellm): apply pyink formatting to thought signature changes

Author: pandego

src/google/adk/models/lite_llm.py

@@ -179,10 +179,10 @@ def _encode_litellm_tool_call_id(
 
   encoded_signature = base64.b64encode(thought_signature).decode("utf-8")
   return (
-      f"{tool_call_id}{_LITELLM_THOUGHT_SIGNATURE_SEPARATOR}"
-      f"{encoded_signature}"
+      f"{tool_call_id}{_LITELLM_THOUGHT_SIGNATURE_SEPARATOR}{encoded_signature}"
   )
 
+
 _LITELLM_IMPORTED = False
 _LITELLM_GLOBAL_SYMBOLS = (
     "ChatCompletionAssistantMessage",

tests/unittests/models/test_litellm.py

@@ -2261,10 +2261,12 @@ async def test_content_to_message_param_embeds_thought_signature_in_tool_call():
   tool_calls = message["tool_calls"]
   assert tool_calls is not None
   assert len(tool_calls) == 1
-  assert (
-      tool_calls[0]["id"]
-      == "test_tool_call_id__thought__"
-      + base64.b64encode(b"gemini_signature").decode("utf-8")
+  assert tool_calls[0][
+      "id"
+  ] == "test_tool_call_id__thought__" + base64.b64encode(
+      b"gemini_signature"
+  ).decode(
+      "utf-8"
   )