fixes some key names for in LayoutLMv2 / LayoutXLM tokenizers (#14493)

in case of left padding_side there was a copy/paste error
assigning the bbox data to the labels

Author: Valentin

src/transformers/models/layoutlmv2/tokenization_layoutlmv2.py

@@ -1275,7 +1275,7 @@ def _pad(
                 if "bbox" in encoded_inputs:
                     encoded_inputs["bbox"] = [self.pad_token_box] * difference + encoded_inputs["bbox"]
                 if "labels" in encoded_inputs:
-                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["bbox"]
+                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["labels"]
                 if "special_tokens_mask" in encoded_inputs:
                     encoded_inputs["special_tokens_mask"] = [1] * difference + encoded_inputs["special_tokens_mask"]
                 encoded_inputs[self.model_input_names[0]] = [self.pad_token_id] * difference + required_input

src/transformers/models/layoutlmv2/tokenization_layoutlmv2_fast.py

@@ -746,7 +746,7 @@ def _pad(
                 if "bbox" in encoded_inputs:
                     encoded_inputs["bbox"] = [self.pad_token_box] * difference + encoded_inputs["bbox"]
                 if "labels" in encoded_inputs:
-                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["bbox"]
+                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["labels"]
                 if "special_tokens_mask" in encoded_inputs:
                     encoded_inputs["special_tokens_mask"] = [1] * difference + encoded_inputs["special_tokens_mask"]
                 encoded_inputs[self.model_input_names[0]] = [self.pad_token_id] * difference + required_input

src/transformers/models/layoutxlm/tokenization_layoutxlm.py

@@ -1051,7 +1051,7 @@ def _pad(
                 if "bbox" in encoded_inputs:
                     encoded_inputs["bbox"] = [self.pad_token_box] * difference + encoded_inputs["bbox"]
                 if "labels" in encoded_inputs:
-                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["bbox"]
+                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["labels"]
                 if "special_tokens_mask" in encoded_inputs:
                     encoded_inputs["special_tokens_mask"] = [1] * difference + encoded_inputs["special_tokens_mask"]
                 encoded_inputs[self.model_input_names[0]] = [self.pad_token_id] * difference + required_input

src/transformers/models/layoutxlm/tokenization_layoutxlm_fast.py

@@ -614,7 +614,7 @@ def _pad(
                 if "bbox" in encoded_inputs:
                     encoded_inputs["bbox"] = [self.pad_token_box] * difference + encoded_inputs["bbox"]
                 if "labels" in encoded_inputs:
-                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["bbox"]
+                    encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["labels"]
                 if "special_tokens_mask" in encoded_inputs:
                     encoded_inputs["special_tokens_mask"] = [1] * difference + encoded_inputs["special_tokens_mask"]
                 encoded_inputs[self.model_input_names[0]] = [self.pad_token_id] * difference + required_input