bug#23794: Emacs 25.0.94: Patch to make sort-lines respect visible lines (fairly urgent)

[Lars Ingebrigtsen]

Robert Weiner <rsw@gnu.org> writes:

> sort-lines calls forward-line rather than forward-visible line, so if
> you have emacs outline entries that are collapsed/hidden to single lines
> each and you try to sort them, their bodies and subtrees are sorted
> separately because forward-visible-line is not used.
>
> This patch fixes this problem and also unifies the calling convention of
> forward-visible-line with that of forward-line (allowing it to take an
> optional argument) leading to a cleaner calling convention.

This was three years ago, and from what I can tell, nobody has changed
sort-lines to be aware of invisible lines...  I can see the case for
allowing the caller to control this, but none of the patches proposed
look acceptable to me (for instance, one made sort.el check for outline
mode explicitly, which seems backwards).

-- 
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   bloggy blog: http://lars.ingebrigtsen.no