Reorganize repo (#8580)

* Put models in subfolders

* Styling

* Fix imports in tests

* More fixes in test imports

* Sneaky hidden imports

* Fix imports in doc files

* More sneaky imports

* Finish fixing tests

* Fix examples

* Fix path for copies

* More fixes for examples

* Fix dummy files

* More fixes for example

* More model import fixes

* Is this why you're unhappy GitHub?

* Fix imports in conver command

src/transformers/data/datasets/squad.py

@@ -9,7 +9,7 @@ from torch.utils.data.dataset import Dataset
 
 from filelock import FileLock
 
-from ...modeling_auto import MODEL_FOR_QUESTION_ANSWERING_MAPPING
+from ...models.auto.modeling_auto import MODEL_FOR_QUESTION_ANSWERING_MAPPING
 from ...tokenization_utils import PreTrainedTokenizer
 from ...utils import logging
 from ..processors.squad import SquadFeatures, SquadV1Processor, SquadV2Processor, squad_convert_examples_to_features

src/transformers/data/metrics/squad_metrics.py

@@ -14,7 +14,7 @@ import math
 import re
 import string
 
-from transformers.tokenization_bert import BasicTokenizer
+from transformers import BasicTokenizer
 
 from ...utils import logging
 

src/transformers/data/processors/squad.py

@@ -7,7 +7,7 @@ import numpy as np
 from tqdm import tqdm
 
 from ...file_utils import is_tf_available, is_torch_available
-from ...tokenization_bert import whitespace_tokenize
+from ...models.bert.tokenization_bert import whitespace_tokenize
 from ...tokenization_utils_base import BatchEncoding, PreTrainedTokenizerBase, TruncationStrategy
 from ...utils import logging
 from .utils import DataProcessor