[Doctest] Fixing mobile bert configuration doctest (#19557)

* Fixing mobile bert configuration doctest

* Fixed build failures by removing empty line

src/transformers/models/mobilebert/configuration_mobilebert.py

@@ -93,12 +93,12 @@ class MobileBertConfig(PretrainedConfig):
     Examples:
 
     ```python
-    >>> from transformers import MobileBertModel, MobileBertConfig
+    >>> from transformers import MobileBertConfig, MobileBertModel
 
     >>> # Initializing a MobileBERT configuration
     >>> configuration = MobileBertConfig()
 
-    >>> # Initializing a model from the configuration above
+    >>> # Initializing a model (with random weights) from the configuration above
     >>> model = MobileBertModel(configuration)
 
     >>> # Accessing the model configuration

utils/documentation_tests.txt

@@ -61,6 +61,7 @@ src/transformers/models/longt5/modeling_longt5.py
 src/transformers/models/marian/modeling_marian.py
 src/transformers/models/markuplm/modeling_markuplm.py
 src/transformers/models/mbart/modeling_mbart.py
+src/transformers/models/mobilebert/configuration_mobilebert.py
 src/transformers/models/mobilebert/modeling_mobilebert.py
 src/transformers/models/mobilebert/modeling_tf_mobilebert.py
 src/transformers/models/mobilevit/modeling_mobilevit.py