bug#22658: 25.1.50; `undo-auto--boundary-timer` -- is it necessary to put this on a the `timer-list'?

[Keith David Bershatsky]

Thank you, Eli, for taking a look at #22658.

I didn't see an off switch because `undo-auto--undoable-change` is triggered 
from `insdel.c` and the timer will renew itself if it is merely removed from 
the `timer-list`.  I like undo/redo, but find myself spinning my mental wheels 
to see if this can somehow be moved to some type of hook or simply hard-wired 
to something other than a timer.

;;  Prevent the `timer-list' from receiving `undo-auto--boundary-timer'.
(defun undo-auto--undoable-change ()
  "Called after every undoable buffer change."
  ;; (add-to-list 'undo-auto--undoably-changed-buffers (current-buffer))
  ;; (undo-auto--boundary-ensure-timer)
  )
(setq timer-list (delq 'undo-auto--boundary-timer timer-list))

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At Sun, 14 Feb 2016 18:35:49 +0200,
Eli Zaretskii wrote:
> 
> 
> You can always remove the timer from timer-list, can't you?  In Emacs
> 25.1.50, there's even a command to do that.