bpo-37363: Add audit events for a range of modules (GH-14301)

diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index ede5c3c..ad49d7f 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -585,6 +585,13 @@
       with Popen(["ifconfig"], stdout=PIPE) as proc:
           log.write(proc.stdout.read())
 
+   .. audit-event:: subprocess.Popen "executable args cwd env"
+
+      Popen and the other functions in this module that use it raise an
+      :ref:`auditing event <auditing>` ``subprocess.Popen`` with arguments
+      ``executable``, ``args``, ``cwd``, ``env``. The value for ``args``
+      may be a single string or a list of strings, depending on platform.
+
    .. versionchanged:: 3.2
       Added context manager support.