Allow/recommend explicit args for minor-modes in file local eval:s.

* lisp/files.el (hack-one-local-variable-eval-safep):
Allow minor-modes with explicit +/-1 arguments.

* doc/emacs/custom.texi (Specifying File Variables):
Recommend explicit arguments for minor modes.

* etc/NEWS: Likewise.

* lisp/doc-view.el, lisp/net/soap-client.el: Update file locals.

4 files changed, 9 insertions, 4 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index d6e247eeb43..af36f8c9b98 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2011-06-09  Glenn Morris  <rgm@gnu.org>
+
+        * files.el (hack-one-local-variable-eval-safep):
+        Allow minor-modes with explicit +/-1 arguments.
+
 2011-06-09  Teodor Zlatanov  <tzz@lifelogs.com>
 
         * term/xterm.el (xterm): Add defgroup.
diff --git a/lisp/doc-view.el b/lisp/doc-view.el
index 06c3b70a3a6..666c6a8b034 100644
--- a/lisp/doc-view.el
+++ b/lisp/doc-view.el
@@ -1550,7 +1550,7 @@ See the command `doc-view-mode' for more information on this mode."
 (provide 'doc-view)
 
 ;; Local Variables:
-;; eval: (outline-minor-mode)
+;; eval: (outline-minor-mode 1)
 ;; End:
 
 ;;; doc-view.el ends here
diff --git a/lisp/files.el b/lisp/files.el
index 5b950e0d409..317153dc9bf 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -2635,7 +2635,7 @@ we don't actually set it to the same mode the buffer already has."
   ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
   (let (end done mode modes)
     ;; Once we drop the deprecated feature where mode: is also allowed to
-    ;; specify minor-modes (ie, there can be more than one "mode:), we can
+    ;; specify minor-modes (ie, there can be more than one "mode:"), we can
     ;; remove this section and just let (hack-local-variables t) handle it.
     ;; Find a -*- mode tag.
     (save-excursion
@@ -3367,7 +3367,7 @@ 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 (null (cdr exp))
+           (or (and (member (cdr exp) '(nil (1) (-1)))
                     (string-match "-mode\\'" (symbol-name (car exp))))
                (let ((prop (get (car exp) 'safe-local-eval-function)))
                  (cond ((eq prop t)
diff --git a/lisp/net/soap-client.el b/lisp/net/soap-client.el
index 9862332bf3f..b7b0b61f4e1 100644
--- a/lisp/net/soap-client.el
+++ b/lisp/net/soap-client.el
@@ -1745,7 +1745,7 @@ operations in a WSDL document."
 
 
 ;;; Local Variables:
-;;; eval: (outline-minor-mode)
+;;; eval: (outline-minor-mode 1)
 ;;; outline-regexp: ";;;;+"
 ;;; End: