fixed response

app.py

@@ -551,9 +551,9 @@ if __name__ == '__main__':
                 #    token = f"\n{token}"
                 #if re.match(r"^[1-9]\.",token.choices[0].delta.content):
                 #    token = f"\n{token}"
-
-                history[-1]['content'] += token.choices[0].delta.content
-                yield history, image_gallery
+                if token.choices[0].delta.content != "":
+                    history[-1]['content'] += token.choices[0].delta.content
+                    yield history, image_gallery
             end = time.time()
             print("End2End Query took", end - start, "seconds!")