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* lisp/simple.el (indicate-copied-region): New function.
(kill-ring-save): Split off from here.

* lisp/rect.el (copy-rectangle-as-kill): Call indicate-copied-region.
(kill-rectangle): Set deactivate-mark to t on read-only error.

* lisp/register.el (copy-to-register, copy-rectangle-to-register):
Deactivate the mark, and use indicate-copied-region.
(append-to-register, prepend-to-register): Call

Fixes: debbugs:10056