Remove old cl-assert calls in 'newline'

* lisp/simple.el (newline): Remove cl-assert calls
that didn't seem to be helping us debug Bug#18913,
and that caused problems as reported in Bug#28280.
Suggested by Glenn Morris (Bug#28280#8).

diff --git a/lisp/simple.el b/lisp/simple.el
index 1ffe1810672c3fa8935a72e993e2f0255abea7ad..4e42fd52415f8d3ad96a78da84ab221231a5cb61 100644 (file)
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -434,10 +434,6 @@ A non-nil INTERACTIVE argument means to run the `post-self-insert-hook'."
           ;; Do the rest in post-self-insert-hook, because we want to do it
           ;; *before* other functions on that hook.
           (lambda ()
-            ;; We are not going to insert any newlines if arg is
-            ;; non-positive.
-            (or (and (numberp arg) (<= arg 0))
-                (cl-assert (eq ?\n (char-before))))
             ;; Mark the newline(s) `hard'.
             (if use-hard-newlines
                 (set-hard-newline-properties
@@ -456,25 +452,22 @@ A non-nil INTERACTIVE argument means to run the `post-self-insert-hook'."
             ;; starts a page.
             (or was-page-start
                 (move-to-left-margin nil t)))))
-    (unwind-protect
-        (if (not interactive)
-            ;; FIXME: For non-interactive uses, many calls actually
-            ;; just want (insert "\n"), so maybe we should do just
-            ;; that, so as to avoid the risk of filling or running
-            ;; abbrevs unexpectedly.
-            (let ((post-self-insert-hook (list postproc)))
-              (self-insert-command arg))
-          (unwind-protect
-              (progn
-                (add-hook 'post-self-insert-hook postproc nil t)
-                (self-insert-command arg))
-            ;; We first used let-binding to protect the hook, but that
-            ;; was naive since add-hook affects the symbol-default
-            ;; value of the variable, whereas the let-binding might
-            ;; only protect the buffer-local value.
-            (remove-hook 'post-self-insert-hook postproc t)))
-      (cl-assert (not (member postproc post-self-insert-hook)))
-      (cl-assert (not (member postproc (default-value 'post-self-insert-hook))))))
+    (if (not interactive)
+       ;; FIXME: For non-interactive uses, many calls actually
+       ;; just want (insert "\n"), so maybe we should do just
+       ;; that, so as to avoid the risk of filling or running
+       ;; abbrevs unexpectedly.
+       (let ((post-self-insert-hook (list postproc)))
+         (self-insert-command arg))
+      (unwind-protect
+         (progn
+           (add-hook 'post-self-insert-hook postproc nil t)
+           (self-insert-command arg))
+       ;; We first used let-binding to protect the hook, but that
+       ;; was naive since add-hook affects the symbol-default
+       ;; value of the variable, whereas the let-binding might
+       ;; only protect the buffer-local value.
+       (remove-hook 'post-self-insert-hook postproc t))))
   nil)
 
 (defun set-hard-newline-properties (from to)