Issue #9583: Document startup option/environment interaction.
Patch by Todd Rovito.
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 0d12126..cd4d02f 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -379,7 +379,10 @@
Environment variables
---------------------
-These environment variables influence Python's behavior.
+These environment variables influence Python's behavior, they are processed
+before the command-line switches other than -E. It is customary that
+command-line switches override environmental variables where there is a
+conflict.
.. envvar:: PYTHONHOME
@@ -570,4 +573,3 @@
If set, Python will print memory allocation statistics every time a new
object arena is created, and on shutdown.
-