bug#74799: [PATCH] Clarify that save-place-file must be set before save-place-mode starts

[Hong Xu]

---
 lisp/saveplace.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/saveplace.el b/lisp/saveplace.el
index 012e305f7f45..ea67c4567b63 100644
--- a/lisp/saveplace.el
+++ b/lisp/saveplace.el
@@ -63,7 +63,8 @@ save-place-alist
 This alist is saved between Emacs sessions.")
 
 (defcustom save-place-file (locate-user-emacs-file "places" ".emacs-places")
-  "Name of the file that records `save-place-alist' value."
+  "Name of the file that records `save-place-alist' value.
+Must be set before starting save-place-mode."
   :version "24.4"                       ; added locate-user-emacs-file
   :type 'file)
 
-- 
2.45.2