> + (defvar before-kill-functions nil
> + "List of functions called on the region before killing.
> + This abnormal hook is run before `kill-region' and
> + `copy-region-as-kill', with the beginning and end positions of
> + the killed region as the arguments.")
I think it's usually important to keep the property that killing doesn't
modify the buffer's text (when used in copy-as-kill), so rather than having
before-kill-functions modify the buffer's text just before it's put in the
kill-ring, it would be more convenient to make it return the string,
i.e. use it as a replacement for buffer-substring.
Stefan
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