bpo-37390: Add audit event table to documentations (GH-14406)

Also updates some (unreleased) event names to be consistent with the others.
diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index 28c5da9..fce9a74 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -120,7 +120,7 @@
 
    This is an alias for the builtin :func:`open` function.
 
-   .. audit-event:: open "path mode flags"
+   .. audit-event:: open path,mode,flags io.open
 
       This function raises an :ref:`auditing event <auditing>` ``open`` with
       arguments ``path``, ``mode`` and ``flags``. The ``mode`` and ``flags``