Use derived-mode-p consistently in info.el

* lisp/info.el (Info-hide-note-references, info-display-manual)
(info--manual-names): Use derived-mode-p.  (Bug#27583)

diff --git a/lisp/info.el b/lisp/info.el
index e22466af871f83eac1e92d788471282b80bb0db2..02f3ea580b067f38d9e580509ba6365a658d8bad 100644 (file)
--- a/lisp/info.el
+++ b/lisp/info.el
@@ -318,7 +318,7 @@ want to set `Info-refill-paragraphs'."
         (set sym val)
         (dolist (buffer (buffer-list))
           (with-current-buffer buffer
-            (when (eq major-mode 'Info-mode)
+             (when (derived-mode-p 'Info-mode)
               (revert-buffer t t)))))
   :group 'info)
 
@@ -5332,7 +5332,7 @@ completion alternatives to currently visited manuals."
        found)
     (dolist (buffer blist)
       (with-current-buffer buffer
-       (when (and (eq major-mode 'Info-mode)
+        (when (and (derived-mode-p 'Info-mode)
                   (stringp Info-current-file)
                   (string-match manual-re Info-current-file))
          (setq found buffer
@@ -5347,7 +5347,7 @@ completion alternatives to currently visited manuals."
   (let (names)
     (dolist (buffer (buffer-list))
       (with-current-buffer buffer
-       (and (eq major-mode 'Info-mode)
+        (and (derived-mode-p 'Info-mode)
             (stringp Info-current-file)
             (not (string= (substring (buffer-name) 0 1) " "))
             (push (file-name-sans-extension