Update Python version in Darglint workflow to 3.12 and fix formatting in test_response_api.py

Author: amanjaiswal73892

.github/workflows/darglint.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.11'
+          python-version: '3.12'
           cache: 'pip' # caching pip dependencies
 
       - name: Pip install

tests/llm/test_response_api.py

@@ -312,7 +312,7 @@ def test_openai_response_model_parse_and_cost():
     function_call and reasoning outputs.
     """
     args = OpenAIResponseModelArgs(model_name="gpt-4.1")
-    
+
     # Mock outputs
     mock_function_call_output = {
         "type": "function_call",
@@ -326,9 +326,9 @@ def test_openai_response_model_parse_and_cost():
         input_tokens=70,
         output_tokens=40,
     )
-    
+
     # Mock the OpenAI client to avoid needing OPENAI_API_KEY
-    with patch('agentlab.llm.response_api.OpenAI') as mock_openai_class:
+    with patch("agentlab.llm.response_api.OpenAI") as mock_openai_class:
         mock_client = MagicMock()
         mock_openai_class.return_value = mock_client
         model = args.make_model()