Honor 'Info-additional-directory-list' in 'C-h R' completion

* lisp/info.el (info--manual-names): Take into account
'Info-additional-directory-list', in addition to
'Info-directory-list'.  (Bug#71368)

1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/info.el b/lisp/info.el
index c2c393cb243..d151c6365b8 100644
--- a/lisp/info.el
+++ b/lisp/info.el
@@ -5675,7 +5675,9 @@ completion alternatives to currently visited manuals."
                            (all-completions
                             ""
                             (apply-partially #'Info-read-node-name-2
-                                             Info-directory-list
+                                             (append
+                                              Info-directory-list
+                                              Info-additional-directory-list)
                                              (mapcar #'car Info-suffix-list))))))))
 
 (provide 'info)