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)

1 files changed, 3 insertions, 3 deletions

diff --git a/lisp/info.el b/lisp/info.el
index e22466af871..02f3ea580b0 100644
--- 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