* simple.el (kill-region): If the buffer is read-only, call

* simple.el (kill-region): If the buffer is read-only, call
	`barf-if-buffer-read-only' instead of just `ding', to get the
	appropriate error condition and message.

	* simple.el (insert-buffer): Make sure this returns nil.

	* simple.el (quoted-insert): Use insert-char, instead of writing
	out the loop.