Fix error when describing menu items that don't have equivalent keys

* lisp/help-fns.el (help-fns--key-bindings): Never pass nil to
insert.

diff --git a/lisp/help-fns.el b/lisp/help-fns.el
index 7858d88985f071929477d99fae4b49b03962009a..98a1b11e088d515611c93835736b629210460d0b 100644 (file)
--- a/lisp/help-fns.el
+++ b/lisp/help-fns.el
@@ -547,9 +547,9 @@ suitable file is found, return nil."
               (insert "\n"))
             (when menus
               (let ((start (point)))
-                (insert "It can "
-                        (and keys "also ")
-                        "be invoked from the menu: ")
+                (insert (concat "It can "
+                                (and keys "also ")
+                                "be invoked from the menu: "))
                 ;; FIXME: Should insert menu names instead of key
                 ;; binding names.
                 (help-fns--insert-bindings menus)