Remove some `toggle-read-only' warnings.

* lisp/bs.el (bs-toggle-readonly): Call `toggle-read-only' interactively.

* lisp/descr-text.el (describe-char):
  lisp/progmodes/python.el (python-describe-symbol):
  Don't call `toggle-read-only', set `buffer-read-only'.

lisp/bs.el

@@ -964,7 +964,7 @@ Default is `bs--current-sort-function'."
 Uses function `toggle-read-only'."
   (interactive)
   (with-current-buffer (bs--current-buffer)
-    (toggle-read-only))
+    (call-interactively 'toggle-read-only))
   (bs--update-current-line))
 
 (defun bs-clear-modified ()

lisp/descr-text.el

@@ -806,7 +806,7 @@ relevant to POS."
                             (format "  %s: %s\n" elt val)))))))
 
           (if text-props-desc (insert text-props-desc))
-          (toggle-read-only 1))))))
+          (setq buffer-read-only t))))))
 
 (define-obsolete-function-alias 'describe-char-after 'describe-char "22.1")
 

lisp/progmodes/python.el

@@ -1768,7 +1768,7 @@ will."
   ;; allow C-c C-f in help buffer.
   (let ((temp-buffer-show-hook		; avoid xref stuff
 	 (lambda ()
-	   (toggle-read-only 1)
+	   (setq buffer-read-only t)
 	   (setq view-return-to-alist
 		 (list (cons (selected-window) help-return-method))))))
     (with-output-to-temp-buffer (help-buffer)