fix: convert the generator to a string

app.py

@@ -140,7 +140,7 @@ chat_interface = gr.ChatInterface(
     ) 
 
 def evolve_text(x):
-    return next(generate(
+    return "".join(x for x in generate(
         x, "", "<|endoftext|>", 
         temperature=0.9, max_new_tokens=10, 
         top_p=0.95, repetition_penalty=1.2,