[Doctest] Add configuration_convbert.py (#19643)

* ConvBERT config for doctest

* Add empty lines

src/transformers/models/convbert/configuration_convbert.py

@@ -85,12 +85,14 @@ class ConvBertConfig(PretrainedConfig):
     Example:
 
     ```python
-    >>> from transformers import ConvBertModel, ConvBertConfig
+    >>> from transformers import ConvBertConfig, ConvBertModel
 
     >>> # Initializing a ConvBERT convbert-base-uncased style configuration
     >>> configuration = ConvBertConfig()
-    >>> # Initializing a model from the convbert-base-uncased style configuration
+
+    >>> # Initializing a model (with random weights) from the convbert-base-uncased style configuration
     >>> model = ConvBertModel(configuration)
+
     >>> # Accessing the model configuration
     >>> configuration = model.config
     ```"""

utils/documentation_tests.txt

@@ -36,6 +36,7 @@ src/transformers/models/canine/configuration_canine.py
 src/transformers/models/codegen/configuration_codegen.py
 src/transformers/models/conditional_detr/configuration_conditional_detr.py
 src/transformers/models/conditional_detr/modeling_conditional_detr.py
+src/transformers/models/convbert/configuration_convbert.py
 src/transformers/models/convnext/modeling_convnext.py
 src/transformers/models/ctrl/configuration_ctrl.py
 src/transformers/models/ctrl/modeling_ctrl.py