bug#65621: [PATCH] `dired-next-line' go to meaningful line

[Drew Adams]

> I'd probably enable it if we had such an option, FWIW.
> 
> But Drew's point about inserted subdirs would need to be addressed.
> My ideal behavior in that case is that it jumps to the file in the
> next/previous directory.

IMO, _definitely not_.  At most it should move
to the subdir header line, skipping only the
blank line before it.

The dired+.el optional wraparound behavior I
described moves, like the vanilla behavior, to
the next line.  It just wraps around, so it
doesn't move to the last line of the buffer
(which is empty).

It could be argued that the blank lines that
precede headings of inserted subdirs could be
skipped over.  But it should _definitely_ move
to the header lines themselves.

There are lots of Dired operations that you can
use on directory header lines.  `m', for example,
marks each line shown in the subdir listing.