bug#14089: 24.3; file local variables can't have a colon in their name

[schulte . eric]

To reproduce this bug, try to open a file like the attached Org-mode
file.  The phrase "Malformed mode-line" will be echoed in the
mini-buffer even though this file uses legal file local variable syntax.

# -*- org-babel-default-header-args:R ((session . "R")) -*-
#+Title: Example Demonstrating a File Local Variable Bug
#+Author: Eric Schulte
#+Date: <2013-03-29 Fri>

This `hack-local-variables-prop-line' function chokes on this variable
name.  To my knowledge it is legal to have a ":" in a variable name,
and this practice is widely used in Org-mode, specifically in
variables which one would want to set in a file local manner.

This patch fixes this bug, I've signed the Emacs FSF copyright
assignment papers, but it is a tiny patch so it shouldn't matter.

Thanks!

# Bazaar merge directive format 2 (Bazaar 0.90)
# revision_id: schulte.eric@gmail.com-20130328230926-46be4fl21w1g28wc
# target_branch: http://bzr.savannah.gnu.org/r/emacs/trunk/
# testament_sha1: 969600ed8b879f2317f13e9f06968aafad4f786d
# timestamp: 2013-03-28 17:09:47 -0600
# base_revision_id: monnier@iro.umontreal.ca-20130328163306-\
#   419khox8aneaoaxv
# 
# Begin patch
=== modified file 'lisp/files.el'
--- lisp/files.el       2013-03-24 06:42:25 +0000
+++ lisp/files.el       2013-03-28 23:09:26 +0000
@@ -3058,7 +3058,11 @@
               (while (and (or (not mode-only)
                               (not result))
                           (< (point) end))
-                (unless (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*")
+                 ;; The first of these next two regexs handles the
+                 ;; case when a variable name includes a ":", such as
+                 ;; the `org-babel-default-header-args:R' variable.
+                (unless (or (looking-at "[ \t]*\\([^ \t\n]?+\\)[ \t]*:[ \t]*")
+                             (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ 
\t]*"))
                   (message "Malformed mode-line")
                   (throw 'malformed-line nil))
                 (goto-char (match-end 0))

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