[Doctest] Add `configuration_bert.py` to doctest (#19485)

* BertConfig for doctest

* Change import order
Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

src/transformers/models/bert/configuration_bert.py

@@ -123,12 +123,12 @@ class BertConfig(PretrainedConfig):
     Examples:
 
     ```python
-    >>> from transformers import BertModel, BertConfig
+    >>> from transformers import BertConfig, BertModel
 
     >>> # Initializing a BERT bert-base-uncased style configuration
     >>> configuration = BertConfig()
 
-    >>> # Initializing a model from the bert-base-uncased style configuration
+    >>> # Initializing a model (with random weights) from the bert-base-uncased style configuration
     >>> model = BertModel(configuration)
 
     >>> # Accessing the model configuration

utils/documentation_tests.txt

@@ -16,6 +16,7 @@ src/transformers/models/albert/modeling_albert.py
 src/transformers/models/albert/modeling_tf_albert.py
 src/transformers/models/bart/modeling_bart.py
 src/transformers/models/beit/modeling_beit.py
+src/transformers/models/bert/configuration_bert.py
 src/transformers/models/bert/modeling_bert.py
 src/transformers/models/bert/modeling_tf_bert.py
 src/transformers/models/bigbird_pegasus/modeling_bigbird_pegasus.py