use the correct add_start_docstrings (#7174)

src/transformers/tokenization_marian.py

@@ -7,7 +7,7 @@ from typing import Dict, List, Optional, Tuple, Union
 
 import sentencepiece
 
-from .file_utils import add_start_docstrings_to_callable
+from .file_utils import add_start_docstrings
 from .tokenization_utils import BatchEncoding, PreTrainedTokenizer
 from .tokenization_utils_base import PREPARE_SEQ2SEQ_BATCH_DOCSTRING
 
@@ -125,7 +125,7 @@ class MarianTokenizer(PreTrainedTokenizer):
         # We don't expect to process pairs, but leave the pair logic for API consistency
         return token_ids_0 + token_ids_1 + [self.eos_token_id]
 
-    @add_start_docstrings_to_callable(PREPARE_SEQ2SEQ_BATCH_DOCSTRING)
+    @add_start_docstrings(PREPARE_SEQ2SEQ_BATCH_DOCSTRING)
     def prepare_seq2seq_batch(
         self,
         src_texts: List[str],

src/transformers/tokenization_mbart.py

@@ -15,7 +15,7 @@
 
 from typing import List, Optional
 
-from .file_utils import add_start_docstrings_to_callable
+from .file_utils import add_start_docstrings
 from .tokenization_utils import BatchEncoding
 from .tokenization_utils_base import PREPARE_SEQ2SEQ_BATCH_DOCSTRING
 from .tokenization_xlm_roberta import XLMRobertaTokenizer
@@ -156,7 +156,7 @@ class MBartTokenizer(XLMRobertaTokenizer):
         # We don't expect to process pairs, but leave the pair logic for API consistency
         return self.prefix_tokens + token_ids_0 + token_ids_1 + self.suffix_tokens
 
-    @add_start_docstrings_to_callable(PREPARE_SEQ2SEQ_BATCH_DOCSTRING)
+    @add_start_docstrings(PREPARE_SEQ2SEQ_BATCH_DOCSTRING)
     def prepare_seq2seq_batch(
         self,
         src_texts: List[str],

src/transformers/tokenization_pegasus.py

@@ -16,7 +16,7 @@ from typing import Dict, List, Optional
 
 from transformers.tokenization_reformer import ReformerTokenizer
 
-from .file_utils import add_start_docstrings_to_callable
+from .file_utils import add_start_docstrings
 from .tokenization_utils_base import PREPARE_SEQ2SEQ_BATCH_DOCSTRING, BatchEncoding
 
 
@@ -104,7 +104,7 @@ class PegasusTokenizer(ReformerTokenizer):
         # We don't expect to process pairs, but leave the pair logic for API consistency
         return token_ids_0 + token_ids_1 + [self.eos_token_id]
 
-    @add_start_docstrings_to_callable(PREPARE_SEQ2SEQ_BATCH_DOCSTRING)
+    @add_start_docstrings(PREPARE_SEQ2SEQ_BATCH_DOCSTRING)
     def prepare_seq2seq_batch(
         self,
         src_texts: List[str],