Make files distinct by adding docstrings.

src/ragged/__init__.py

@@ -1,8 +1,13 @@
 # BSD 3-Clause License; see https://github.com/scikit-hep/ragged/blob/main/LICENSE
 
-from __future__ import annotations
+"""
+Ragged array module.
+
+FIXME: needs more documentation!
 
-from ._version import version as __version__
-from .v202212 import array
+Version 2022.12 is current, so `ragged.v202212.*` is identical to `ragged.*`.
+"""
+
+from __future__ import annotations
 
-__all__ = ["array", "__version__"]
+from .v202212 import *  # noqa: F403

src/ragged/common/__init__.py

@@ -1,5 +1,12 @@
 # BSD 3-Clause License; see https://github.com/scikit-hep/ragged/blob/main/LICENSE
 
+"""
+Generic definitions used by the version-specific modules, such as
+`ragged.v202212`.
+
+https://data-apis.org/array-api/latest/API_specification/
+"""
+
 from __future__ import annotations
 
 from ._obj import array

src/ragged/common/_obj.py

@@ -877,6 +877,3 @@ def __irshift__(self, other: int | array, /) -> array:
     __rxor__ = __xor__
     __rlshift__ = __lshift__
     __rrshift__ = __rshift__
-
-
-__all__ = ["array"]

src/ragged/v202212/__init__.py

@@ -1,5 +1,14 @@
 # BSD 3-Clause License; see https://github.com/scikit-hep/ragged/blob/main/LICENSE
 
+"""
+Defines a ragged array module that is compliant with version 2022.12 of the
+Array API.
+
+This is the current default: `ragged.v202212.*` is imported into `ragged.*`.
+
+https://data-apis.org/array-api/2022.12/API_specification/
+"""
+
 from __future__ import annotations
 
 from ._obj import array