Do not touch sys.path when site is imported and python was started with -S.
Original patch by Carl Meyer, review by Brett Cannon, small doc editions by
yours truly. Fixes #11591.
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index d1f47eb..b5a9b32 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -239,7 +239,9 @@
.. cmdoption:: -S
Disable the import of the module :mod:`site` and the site-dependent
- manipulations of :data:`sys.path` that it entails.
+ manipulations of :data:`sys.path` that it entails. Also disable these
+ manipulations if :mod:`site` is explicitly imported later (call
+ :func:`site.main` if you want them to be triggered).
.. cmdoption:: -u