Fix missing docstring.

Author: NeilGirdhar

src/array_api_extra/_delegation.py

@@ -149,7 +149,6 @@ def one_hot(
         An array having the same shape as `x` except for a new axis at the position
         given by `axis` having size `num_classes`.
 
-
         If ``x < 0`` or ``x >= num_classes``, then the result is undefined, may raise
         an exception, or may even cause a bad state.  `x` is not checked.
 

src/array_api_extra/_lib/_funcs.py

@@ -388,8 +388,8 @@ def one_hot(
     x_size: int,
     dtype: DType,
     xp: ModuleType,
-) -> Array:
-    """Helper for _delegation.one_hot."""
+) -> Array:  # numpydoc ignore=PR01,RT01
+    """See docstring in `array_api_extra._delegation.py`."""
     out = xp.zeros((x.size, num_classes), dtype=dtype)
     x_flattened = xp.reshape(x, (-1,))
     if is_numpy_namespace(xp):