bug#51016: 28.0.50; 'diff-font-lock-prettify' breaks display of outline headers

[Lars Ingebrigtsen]

Juri Linkov <juri@linkov.net> writes:

> As noticed in bug#51809, outline-cycle is not bound on hunk headings anymore,
> only on file headings.  It seems the problem is somewhere here:
>
>     (setq diff-outline-regexp
>           (concat "\\(^diff --git.*\n\\|" diff-hunk-header-re "\\)"))
>
> But I don't know why diff-hunk-header-re doesn't match hunk headings
> in outline-minor-mode.

Hm...  I just tried switching outline-minor-mode on and
(re-search-forward diff-hunk-header-re), and it seemed to work as
expected?

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