emacs-28 724f712ef1 1/2: Preserve <title> in the Emacs manuals

[Robert Pluim]

branch: emacs-28
commit 724f712ef17d4a248048d97a8c9b72f95fcf0914
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Robert Pluim <rpluim@gmail.com>

    Preserve <title> in the Emacs manuals
    
    Backport from master.
    
    * admin/admin.el (manual-html-fix-headers): Preserve the <title>
    element (bug#48334).
    
    (cherry picked from commit b778e71af7ca8c59917334b4bb1b34cdb52faca9)
---
 admin/admin.el | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/admin/admin.el b/admin/admin.el
index 57d5afb23b..2a597e624b 100644
--- a/admin/admin.el
+++ b/admin/admin.el
@@ -477,10 +477,11 @@ the @import directive."
       (delete-region opoint (point))
       (search-forward "<meta http-equiv=\"Content-Style")
       (setq opoint (match-beginning 0)))
+    (search-forward "<title>")
+    (delete-region opoint (match-beginning 0))
     (search-forward "</title>\n")
-    (delete-region opoint (point))
-    (search-forward "<link href=")
-    (goto-char (match-beginning 0))
+    (when (search-forward "<link href=" nil t)
+      (goto-char (match-beginning 0)))
     (insert manual-links-string)
     (setq opoint (point))
     (search-forward "</head>")