ox-texinfo: Additional fix to @ref commands

* lisp/ox-texinfo.el (org-texinfo--@ref): New function.
(org-texinfo-link): Use new function.

When node name doesn't correspond to actual title, use the third @ref
argument to ensure the node name is not printed nor displayed.

lisp/ox-texinfo.el

@@ -935,9 +935,17 @@ CONTENTS is nil.  INFO is a plist holding contextual information."
 
 ;;;; Link
 
+(defun org-texinfo--@ref (datum description info)
+  "Return @ref command for element or object DATUM.
+DESCRIPTION is the name of the section to print, as a string."
+  (let ((node-name (org-texinfo--get-node datum info))
+	(title (org-texinfo--sanitize-node description)))
+    (if (equal title node-name)
+	(format "@ref{%s}" node-name)
+      (format "@ref{%s, , %s}" node-name title))))
+
 (defun org-texinfo-link (link desc info)
   "Transcode a LINK object from Org to Texinfo.
-
 DESC is the description part of the link, or the empty string.
 INFO is a plist holding contextual information.  See
 `org-export-data'."
@@ -957,9 +965,7 @@ INFO is a plist holding contextual information.  See
      ((equal type "radio")
       (let ((destination (org-export-resolve-radio-link link info)))
 	(if (not destination) desc
-	  (format "@ref{%s,,%s}"
-		  (org-texinfo--get-node destination info)
-		  desc))))
+	  (org-texinfo--@ref destination desc info))))
      ((member type '("custom-id" "id" "fuzzy"))
       (let ((destination
 	     (if (equal type "fuzzy")
@@ -974,32 +980,21 @@ INFO is a plist holding contextual information.  See
 	   (if desc (format "@uref{file://%s,%s}" destination desc)
 	     (format "@uref{file://%s}" destination)))
 	  (`headline
-	   (let ((node-name (org-texinfo--get-node destination info)))
-	     (if desc
-		 (format "@ref{%s, , %s}"
-			 node-name
-			 (org-texinfo--sanitize-node desc))
-	       (format "@ref{%s}" node-name))))
+	   (org-texinfo--@ref
+	    destination
+	    (or desc
+		(org-export-data
+		 (org-element-property :title destination) info))
+	    info))
 	  (_
-	   (format "@ref{%s,,%s}"
-		   (org-texinfo--get-node destination info)
-		   (cond
-		    (desc)
-		    ;; No description is provided: first try to
-		    ;; associate destination to a number.
-		    ((let ((n (org-export-get-ordinal destination info)))
-		       (cond ((not n) nil)
-			     ((integerp n) n)
-			     (t (mapconcat #'number-to-string n ".")))))
-		    ;; Then grab title of headline containing
-		    ;; DESTINATION.
-		    ((let ((h (org-element-lineage destination '(headline) t)))
-		       (and h
-			    (org-export-data
-			     (org-element-property :title destination) info))))
-		    ;; Eventually, just return "Top" to refer to the
-		    ;; beginning of the info file.
-		    (t "Top")))))))
+	   (org-texinfo--@ref
+	    destination
+	    (or desc
+		(pcase (org-export-get-ordinal destination info)
+		  ((and (pred integerp) n) (number-to-string n))
+		  ((and (pred consp) n) (mapconcat #'number-to-string n "."))
+		  (_ "???")))
+	    info)))))			;cannot guess the description
      ((equal type "info")
       (let* ((info-path (split-string path "[:#]"))
 	     (info-manual (car info-path))
@@ -1009,9 +1004,9 @@ INFO is a plist holding contextual information.  See
      ((string= type "mailto")
       (format "@email{%s}"
 	      (concat (org-texinfo--sanitize-content path)
-		      (and desc (concat "," desc)))))
+		      (and desc (concat ", " desc)))))
      ;; External link with a description part.
-     ((and path desc) (format "@uref{%s,%s}" path desc))
+     ((and path desc) (format "@uref{%s, %s}" path desc))
      ;; External link without a description part.
      (path (format "@uref{%s}" path))
      ;; No path, only description.  Try to do something useful.