(tags-table-mode): Disable undo.

admin/FOR-RELEASE

@@ -42,10 +42,6 @@ from 2007-08-27.  Impossible to procede without more input from OP (as
 of 20070912, emails are bouncing) or someone else who can reproduce this.
 http://lists.gnu.org/archive/html/emacs-devel/2007-08/msg01497.html
 
-** TAGS buffer generates spurious undo warnings
-Waiting for recipe to produce these warnings.
-http://lists.gnu.org/archive/html/bug-gnu-emacs/2007-09/msg00070.html
-
 ** emacs-22.1 with GTK problems (with patches)
 Only outstanding issue seems to be whether Solaris 2.6 GTK can be
 supported in the absence of recursive mutexes, via a change to

lisp/ChangeLog

@@ -1,5 +1,7 @@
 2007-11-02  Glenn Morris  <rgm@gnu.org>
 
+	* progmodes/etags.el (tags-table-mode): Disable undo.
+
 	* simple.el (bad-packages-alist): Revert previous change.
 
 2007-11-01  Dan Nicolaescu  <dann@ics.uci.edu>

lisp/progmodes/etags.el

@@ -277,8 +277,9 @@ One argument, the tag info returned by `snarf-tag-function'.")
 (defun tags-table-mode ()
   "Major mode for tags table file buffers."
   (interactive)
-  (setq major-mode 'tags-table-mode)
-  (setq mode-name "Tags Table")
+  (setq major-mode 'tags-table-mode
+        mode-name "Tags Table"
+        buffer-undo-list t)
   (initialize-new-tags-table))
 
 ;;;###autoload