[Doctest] Add configuration_fsmt.py (#19936)

* fsmt doctest

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

src/transformers/models/fsmt/configuration_fsmt.py

@@ -125,8 +125,14 @@ class FSMTConfig(PretrainedConfig):
     ```python
     >>> from transformers import FSMTConfig, FSMTModel
 
-    >>> config = FSMTConfig.from_pretrained("facebook/wmt19-en-ru")
+    >>> # Initializing a FSMT facebook/wmt19-en-ru style configuration
+    >>> config = FSMTConfig()
+
+    >>> # Initializing a model (with random weights) from the configuration
     >>> model = FSMTModel(config)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
     ```"""
     model_type = "fsmt"
     attribute_map = {"num_attention_heads": "encoder_attention_heads", "hidden_size": "d_model"}

utils/documentation_tests.txt

@@ -79,6 +79,7 @@ src/transformers/models/electra/modeling_tf_electra.py
 src/transformers/models/ernie/configuration_ernie.py
 src/transformers/models/flava/configuration_flava.py
 src/transformers/models/fnet/configuration_fnet.py
+src/transformers/models/fsmt/configuration_fsmt.py
 src/transformers/models/glpn/modeling_glpn.py
 src/transformers/models/gpt2/configuration_gpt2.py
 src/transformers/models/gpt2/modeling_gpt2.py