Update app.py

app.py

@@ -174,8 +174,8 @@ def chat_with_model(prompt, document_section, model_choice='gpt-3.5-turbo'):
         chunk_message = (part.choices[0].delta.content or "")
         collected_messages.append(chunk_message)  # save the message
         content=part.choices[0].delta.content
-        all_content += content  
         try:
+            all_content += content  
             report.append(content)
             if len(content) > 0:
                 result = "".join(report).strip()