fix d2s generation bug (#6740)

Author: wj-Mcat

paddlenlp/transformers/generation_utils.py

@@ -1398,8 +1398,8 @@ def _post_process_(outputs, input_ids, cur_len, origin_len, scores, unfinished_f
                         unfinished_flag,
                         model_kwargs,
                     )
-                paddle.increment(cur_len)
-                paddle.increment(cur_len_gpu)
+                    paddle.increment(cur_len)
+                    paddle.increment(cur_len_gpu)
         else:
             while cur_len < max_length and paddle.any(unfinished_flag):
                 input_ids, scores, unfinished_flag, model_kwargs = _post_process_(
@@ -1411,8 +1411,8 @@ def _post_process_(outputs, input_ids, cur_len, origin_len, scores, unfinished_f
                     unfinished_flag,
                     model_kwargs,
                 )
-            paddle.increment(cur_len)
-            paddle.increment(cur_len_gpu)
+                paddle.increment(cur_len)
+                paddle.increment(cur_len_gpu)
 
         return input_ids[:, origin_len:], scores