[Doctest] Add configuration_deberta_v2.py (#19995)

* Add example docstring for DebertaV2Config

* Add DebertaV2Config to documentation_tests

* Fix mistake with directory name

src/transformers/models/deberta_v2/configuration_deberta_v2.py

@@ -92,7 +92,21 @@ class DebertaV2Config(PretrainedConfig):
             `["p2c", "c2p"]`, `["p2c", "c2p"]`.
         layer_norm_eps (`float`, optional, defaults to 1e-12):
             The epsilon used by the layer normalization layers.
-    """
+
+    Example:
+
+    ```python
+    >>> from transformers import DebertaV2Config, DebertaV2Model
+
+    >>> # Initializing a DeBERTa-v2 microsoft/deberta-v2-xlarge style configuration
+    >>> configuration = DebertaV2Config()
+
+    >>> # Initializing a model (with random weights) from the microsoft/deberta-v2-xlarge style configuration
+    >>> model = DebertaV2Model(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
     model_type = "deberta-v2"
 
     def __init__(

utils/documentation_tests.txt

@@ -51,6 +51,7 @@ src/transformers/models/data2vec/modeling_data2vec_audio.py
 src/transformers/models/data2vec/modeling_data2vec_vision.py
 src/transformers/models/deberta/configuration_deberta.py
 src/transformers/models/deberta/modeling_deberta.py
+src/transformers/models/deberta_v2/configuration_deberta_v2.py
 src/transformers/models/deberta_v2/modeling_deberta_v2.py
 src/transformers/models/decision_transformer/configuration_decision_transformer.py
 src/transformers/models/deformable_detr/modeling_deformable_detr.py