Update app.py

app.py

@@ -175,9 +175,9 @@ def chat_with_model(prompt, document_section, model_choice='gpt-3.5-turbo'):
         collected_messages.append(chunk_message)  # save the message
         content=part.choices[0].delta.content
         try:
-            all_content += content  
-            report.append(content)
             if len(content) > 0:
+                report.append(content)
+                all_content += content  
                 result = "".join(report).strip()
                 res_box.markdown(f'*{result}*') 
         except: