fix bug

agent.py

@@ -102,7 +102,7 @@ def web_search(query: str) -> str:
     search_docs = TavilySearchResults(max_results=3).invoke(query)
     formatted_search_docs = '\n\n---\n\n'.join(
         [
-            f'<Document source="{doc["url"]}" page="{doc.get("title", "")}">\n{doc.get('content', '')}\n</Document>' for doc in search_docs
+            f'<Document source="{doc["url"]}" page="{doc.get("title", "")}">\n{doc.get("content", "")}\n</Document>' for doc in search_docs
         ]
     )
     return {'web_results': formatted_search_docs}