Update app.py

app.py

@@ -488,7 +488,8 @@ def handsome_chat_completions():
                                             if delta.get("reasoning_content") is not None:
                                                 reasoning_chunk = delta["reasoning_content"]
                                                 if first_reasoning_chunk:
-                                                    reasoning_chunk = f"\n<think>\n{reasoning_chunk}"
+                                                    think_chunk = f"<think>\n"
+                                                    yield f"data: {json.dumps({'choices': [{'delta': {'content': think_chunk}, 'index': 0}]})}\n\n"
                                                     first_reasoning_chunk = False
                                                 yield f"data: {json.dumps({'choices': [{'delta': {'content': reasoning_chunk}, 'index': 0}]})}\n\n"