bpo-11233: Create availability directive for documentation (GH-9692)

Replace "Availability: xxx" with ".. availability:: xxx" in the doc.
Original patch by Georg Brandl.

Co-Authored-By: Georg Brandl <georg@python.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/Doc/library/asyncore.rst b/Doc/library/asyncore.rst
index 11d3616..a86518e 100644
--- a/Doc/library/asyncore.rst
+++ b/Doc/library/asyncore.rst
@@ -273,14 +273,18 @@ any that have been added to the map during asynchronous service) is closed.
    with an optional map argument and wraps it for use with the :c:func:`poll`
    or :c:func:`loop` functions.  If provided a file object or anything with a
    :c:func:`fileno` method, that method will be called and passed to the
-   :class:`file_wrapper` constructor.  Availability: UNIX.
+   :class:`file_wrapper` constructor.
+
+   .. availability:: Unix.
 
 .. class:: file_wrapper()
 
    A file_wrapper takes an integer file descriptor and calls :func:`os.dup` to
    duplicate the handle so that the original handle may be closed independently
    of the file_wrapper.  This class implements sufficient methods to emulate a
-   socket for use by the :class:`file_dispatcher` class.  Availability: UNIX.
+   socket for use by the :class:`file_dispatcher` class.
+
+   .. availability:: Unix.
 
 
 .. _asyncore-example-1: