Update app.py

app.py

@@ -107,7 +107,7 @@ def respond(message, history: list[tuple[str, str]], system_message, max_tokens,
             yield response
     
     citations = extract_unique_citations(response)
-    response = response + "\n Fuentes:" citations
+    response = response + "\n Fuentes:" + citations
 
 # Configuración de la interfaz Gradio
 demo = gr.ChatInterface(