Subject: bug#71370: 30.0.50; Please un-obsolete buffer-substring as a generalized variable

From: Stefan Monnier <[email-masked]>
Date: Sun, 23 Mar 2025 10:00:19 -0400

> That is not a necessary condition for making buffer-substring a
> generalized variable.  We could have an internal function, maybe not
> even exposed to Lisp, to replace the buffer substring.

We do, exposed to ELisp:

    (macroexpand '(setf (buffer-substring A B) C))
=~>
    (cl--set-buffer-substring A B C)

- Stefan