More customization-related documentation updates.

* doc/emacs/custom.texi (Specifying File Variables): The mode: keyword
doesn't have to be first anymore.  Add example of specifying minor
modes.
(Directory Variables): Simplify example.  Mention application to
non-file buffers.
(Disabling): Use "initialization file" terminology.
(Init Examples): Fix hook example.

* doc/lispref/variables.texi (Directory Local Variables): Document
hack-dir-local-variables-non-file-buffer.

* lisp/files.el (hack-dir-local-variables-non-file-buffer): Add doc.
(hack-one-local-variable-eval-safep): Allow 0 arg for minor mode
functions, along with 1 and -1.

2 files changed, 11 insertions, 1 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 39007b7e0d4..ec3eacfbc38 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2012-01-06  Chong Yidong  <cyd@gnu.org>
+
+        * files.el (hack-dir-local-variables-non-file-buffer): Add doc.
+        (hack-one-local-variable-eval-safep): Allow 0 arg for minor mode
+        functions, along with 1 and -1.
+
 2012-01-06  Eli Zaretskii  <eliz@gnu.org>
 
         * time.el (display-time-load-average)
diff --git a/lisp/files.el b/lisp/files.el
index 588fda43f5c..d4b06146090 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -3294,7 +3294,7 @@ It is dangerous if either of these conditions are met:
       (and (symbolp (car exp))
            ;; Allow (minor)-modes calls with no arguments.
            ;; This obsoletes the use of "mode:" for such things.  (Bug#8613)
-           (or (and (member (cdr exp) '(nil (1) (-1)))
+           (or (and (member (cdr exp) '(nil (1) (0) (-1)))
                     (string-match "-mode\\'" (symbol-name (car exp))))
                (let ((prop (get (car exp) 'safe-local-eval-function)))
                  (cond ((eq prop t)
@@ -3577,6 +3577,10 @@ and `file-local-variables-alist', without applying them."
             (hack-local-variables-filter variables dir-name)))))))
 
 (defun hack-dir-local-variables-non-file-buffer ()
+  "Apply directory-local variables to a non-file buffer.
+For non-file buffers, such as Dired buffers, directory-local
+variables are looked for in `default-directory' and its parent
+directories."
   (hack-dir-local-variables)
   (hack-local-variables-apply))