[Doctest] Add configuration_deberta.py (#19968)

* Add Example docstring to DebertaConfig

* Add configuration_deberta to documentation_tests

* Add microsoft/deberta-base to example docstring

* Fix example docstring mistake

src/transformers/models/deberta/configuration_deberta.py

@@ -90,7 +90,21 @@ class DebertaConfig(PretrainedConfig):
             `["p2c", "c2p"]`.
         layer_norm_eps (`float`, optional, defaults to 1e-12):
             The epsilon used by the layer normalization layers.
-    """
+
+    Example:
+
+    ```python
+    >>> from transformers import DebertaConfig, DebertaModel
+
+    >>> # Initializing a DeBERTa microsoft/deberta-base style configuration
+    >>> configuration = DebertaConfig()
+
+    >>> # Initializing a model (with random weights) from the microsoft/deberta-base style configuration
+    >>> model = DebertaModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
     model_type = "deberta"
 
     def __init__(

utils/documentation_tests.txt

@@ -49,6 +49,7 @@ src/transformers/models/data2vec/configuration_data2vec_text.py
 src/transformers/models/data2vec/configuration_data2vec_vision.py
 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/modeling_deberta_v2.py
 src/transformers/models/decision_transformer/configuration_decision_transformer.py