docs(builder): add docstring

how2sign.py

@@ -24,8 +24,12 @@ class How2SignConfig(datasets.BuilderConfig):
 
     def __init__(self, name, **kwargs):
         """
-        :param name:    Name of subset.
-        :param kwargs:  Arguments.
+        Parameters
+        ----------
+        name : str
+            Name of subset.
+        kwargs : dict
+            Keyword arguments.
         """
         super(How2SignConfig, self).__init__(
             name=name,
@@ -70,8 +74,16 @@ class How2Sign(datasets.GeneratorBasedBuilder):
     ) -> list[datasets.SplitGenerator]:
         """
         Get splits.
-        :param dl_manager:  Download manager.
-        :return:            Splits.
+
+        Parameters
+        ----------
+        dl_manager : datasets.DownloadManager
+            Download manager.
+
+        Returns
+        -------
+        list[datasets.SplitGenerator]
+            Split generators.
         """
         split_dict = {
             "train": datasets.Split.TRAIN,
@@ -104,10 +116,19 @@ class How2Sign(datasets.GeneratorBasedBuilder):
         video_dirs: list[str],
     ) -> tuple[int, dict]:
         """
-        Generate examples from metadata.
-        :param metadata_path:       Path to metadata.
-        :param visual_dirs:         Directories of videos.
-        :yield:                     Example.
+        Generate examples.
+
+        Parameters
+        ----------
+        metadata_path : str
+            Path to metadata.
+        video_dirs : list[str]
+            List of video directories.
+
+        Returns
+        -------
+        tuple[int, dict]
+            Index and sample.
         """
         split = datasets.load_dataset(
             "csv",