Update app.py

app.py

@@ -30,7 +30,7 @@ class MoonDream():
             img = self.model.encode_image(img)
             res = self.model.answer_question(question=question, image_embeds=img, tokenizer=self.tokenizer)
             yield res
-    return
+        return
 
 def _respond_one(question, img):
   txt = ""