***************
*** 739,744 ****
--- 739,745 ----
(use-local-map occur-mode-map)
(setq major-mode 'occur-mode)
(setq mode-name "Occur")
+ (setq buffer-undo-list t) ; Don't record undo information.
(set (make-local-variable 'revert-buffer-function)
'occur-revert-function)
(make-local-variable 'occur-revert-arguments)
(add-hook 'change-major-mode-hook 'font-lock-defontify nil t)
This is not correct, because it seems to leave buffer-undo-list
permanently set to t. That prevents undoing of changes made by hand
by the user.
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