Complete to "nil" in directory local variables skeleton

* lisp/autoinsert.el (auto-insert-alist): Make "nil" a completion
candidate for the directory local variables skeleton.  The "nil" value
means "any mode" in the context of directory local variable files.

(cherry picked from commit fcd6403d8ebf7ce6e61ba17971d4fdaaaaecf06c)

diff --git a/lisp/autoinsert.el b/lisp/autoinsert.el
index 3d7216420dd631389f81a4484bd33e13001b00bc..9136127c28eba5bc08cb1adfe00296c1cf278da7 100644 (file)
--- a/lisp/autoinsert.el
+++ b/lisp/autoinsert.el
@@ -171,7 +171,7 @@ If this contains a %s, that will be replaced by the matching rule."
      ";;; Directory Local Variables         -*- no-byte-compile: t; -*-\n"
      ";;; For more information see (info \"(emacs) Directory Variables\")\n\n"
      "(("
-     '(setq v1 (let (modes)
+     '(setq v1 (let ((modes '("nil")))
                  (mapatoms (lambda (mode)
                              (let ((name (symbol-name mode)))
                                (when (string-match "-mode\\'" name)