Don't add newlines in minibuffer history

* lisp/simple.el (next-line-or-history-element): Bind
next-line-add-newlines to nil.  (Bug#29529)

Copyright-paperwork-exempt: yes

lisp/simple.el

@@ -2109,6 +2109,8 @@ next element of the minibuffer history in the minibuffer."
   (interactive "^p")
   (or arg (setq arg 1))
   (let* ((old-point (point))
+         ;; Don't add newlines if they have the mode enabled globally.
+         (next-line-add-newlines nil)
 	 ;; Remember the original goal column of possibly multi-line input
 	 ;; excluding the length of the prompt on the first line.
 	 (prompt-end (minibuffer-prompt-end))