[Doctest] Add configuration_realm.py (#19646)

* Update configuration_realm.py

* realm config for doctest

* Update configuration_realm.py doc

* Update documentation_tests

* clean up
Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

src/transformers/models/realm/configuration_realm.py

@@ -116,12 +116,12 @@ class RealmConfig(PretrainedConfig):
     Example:
 
     ```python
-    >>> from transformers import RealmEmbedder, RealmConfig
+    >>> from transformers import RealmConfig, RealmEmbedder
 
     >>> # Initializing a REALM realm-cc-news-pretrained-* style configuration
     >>> configuration = RealmConfig()
 
-    >>> # Initializing a model from the google/realm-cc-news-pretrained-embedder style configuration
+    >>> # Initializing a model (with random weights) from the google/realm-cc-news-pretrained-embedder style configuration
     >>> model = RealmEmbedder(configuration)
 
     >>> # Accessing the model configuration

utils/documentation_tests.txt

@@ -91,6 +91,7 @@ src/transformers/models/pegasus/modeling_pegasus.py
 src/transformers/models/perceiver/modeling_perceiver.py
 src/transformers/models/plbart/modeling_plbart.py
 src/transformers/models/poolformer/modeling_poolformer.py
+src/transformers/models/realm/configuration_realm.py
 src/transformers/models/reformer/configuration_reformer.py
 src/transformers/models/reformer/modeling_reformer.py
 src/transformers/models/regnet/modeling_regnet.py