master 6fd33fbf6a: Merge from origin/emacs-28

[Stefan Kangas]

branch: master
commit 6fd33fbf6a4edf0b905cf1a01bb763e89b860339
Merge: f5fb969cab 73400e4002
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Merge from origin/emacs-28
    
    73400e4002 Clarify what a Calc registeri in in calc-insert-register
---
 lisp/calc/calc-yank.el | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lisp/calc/calc-yank.el b/lisp/calc/calc-yank.el
index 172ccf1adc..e0ed098b70 100644
--- a/lisp/calc/calc-yank.el
+++ b/lisp/calc/calc-yank.el
@@ -303,7 +303,10 @@ Interactively, reads the register using 
`register-read-with-preview'."
 (defun calc-insert-register (register)
   "Insert the contents of register REGISTER.
 
-Interactively, reads the register using `register-read-with-preview'."
+Interactively, reads the register using `register-read-with-preview'.
+
+Note that this command only works with Calc registers, and they
+have nothing to do with the Emacs-wide register mechanism."
   (interactive (list (register-read-with-preview "Insert register: ")))
   (if (eq major-mode 'calc-mode)
       (let ((val (calc-get-register register)))