[Doctest] Add configuration_m2m_100.py (#22733)

m2m-100-config for doctest

src/transformers/models/m2m_100/configuration_m2m_100.py

@@ -88,12 +88,12 @@ class M2M100Config(PretrainedConfig):
     Example:
 
     ```python
-    >>> from transformers import M2M100Model, M2M100Config
+    >>> from transformers import M2M100Config, M2M100Model
 
     >>> # Initializing a M2M100 facebook/m2m100_418M style configuration
     >>> configuration = M2M100Config()
 
-    >>> # Initializing a model from the facebook/m2m100_418M style configuration
+    >>> # Initializing a model (with random weights) from the facebook/m2m100_418M style configuration
     >>> model = M2M100Model(configuration)
 
     >>> # Accessing the model configuration

utils/documentation_tests.txt

@@ -284,6 +284,7 @@ src/transformers/models/layoutxlm/tokenization_layoutxlm_fast.py
 src/transformers/models/llama/tokenization_llama.py
 src/transformers/models/lxmert/tokenization_lxmert.py
 src/transformers/models/lxmert/tokenization_lxmert_fast.py
+src/transformers/models/m2m_100/configuration_m2m_100.py
 src/transformers/models/markuplm/tokenization_markuplm.py
 src/transformers/models/markuplm/tokenization_markuplm_fast.py
 src/transformers/models/mbart/tokenization_mbart.py