Format files by pre-commit run -a

Signed-off-by: Yu Ishikawa <yu-iskw@users.noreply.github.com>

pr_agent/algo/ai_handlers/langchain_ai_handler.py

@@ -1,17 +1,18 @@
 try:
-    from langchain_openai import ChatOpenAI, AzureChatOpenAI
-    from langchain_core.messages import SystemMessage, HumanMessage
+    from langchain_core.messages import HumanMessage, SystemMessage
+    from langchain_openai import AzureChatOpenAI, ChatOpenAI
 except:  # we don't enforce langchain as a dependency, so if it's not installed, just move on
     pass
 
+import functools
+
+from openai import APIError, RateLimitError, Timeout
+from retry import retry
+
 from pr_agent.algo.ai_handlers.base_ai_handler import BaseAiHandler
 from pr_agent.config_loader import get_settings
 from pr_agent.log import get_logger
 
-from openai import APIError, RateLimitError, Timeout
-from retry import retry
-import functools
-
 OPENAI_RETRIES = 5
 
 
@@ -73,4 +74,3 @@ class LangChainOpenAIHandler(BaseAiHandler):
                 raise ValueError(f"OpenAI {e.name} is required") from e
             else:
                 raise e
-