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>
diff --git a/Doc/library/intro.rst b/Doc/library/intro.rst
index e3283ca..8567e4d 100644
--- a/Doc/library/intro.rst
+++ b/Doc/library/intro.rst
@@ -47,3 +47,16 @@
Let the show begin!
+
+.. _availability:
+
+Notes on availability
+=====================
+
+* An "Availability: Unix" note means that this function is commonly found on
+ Unix systems. It does not make any claims about its existence on a specific
+ operating system.
+
+* If not separately noted, all functions that claim "Availability: Unix" are
+ supported on Mac OS X, which builds on a Unix core.
+