bug#58516: 28.1; add option/key to rerun current diff without whitespace changes

[Robert Pluim]

>>>>> On Sat, 15 Oct 2022 22:09:35 +0300, Juri Linkov <juri@linkov.net> said:

    >> +(defun diff-ignore-whitespace-all-hunks ()
    >> +  "Re-diff all the hunks, ignoring whitespace-differences."
    >> +  (interactive)
    >> +  (diff--iterate-hunks (point-max) (lambda (_ _)
    >> +                                     (diff-refresh-hunk t))
    >> +                       (point-min)))

    Juri> A question about performance: would this run the diff command
    Juri> for every hunk?

Yes. I donʼt see an easy way to avoid that: we may not have actual
source files available, so we canʼt just run the diff command with
different switches over the whole file.

Robert
--