python-shell-interpreter doc string clarification

* lisp/progmodes/python.el (python-shell-interpreter): Note what
to do when using ipython3 (bug#44732).

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 20299c20d28abcdbc229751d1d67d8f9b5111455..d5209d8d2f19be23399cca5afd98764e734c8368 100644 (file)
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -2022,7 +2022,12 @@ position, else returns nil."
   (cond ((executable-find "python3") "python3")
         ((executable-find "python") "python")
         (t "python3"))
-  "Default Python interpreter for shell."
+  "Default Python interpreter for shell.
+
+Some Python interpreters also require changes to
+`python-shell-interpreter-args'.  In particular, setting
+`python-shell-interpreter' to \"ipython3\" requires setting
+`python-shell-interpreter-args' to \"--simple-prompt\"."
   :version "28.1"
   :type 'string
   :group 'python)