bug#11571: 24.0.97; doc string of `dired-get-subdir-min'

[Drew Adams]

> I therefore think it's safe to obsolete this function, like in the
> below patch.  Comments?

It's OK by me.  Thx.
___

The use of cdr is clear enough, as long as you
understand what `dired-subdir-alist' is.

But that could be clearer. 

`C-h v dired-subdir-alist' says:

 Association list of subdirectories and their buffer positions.
 Each subdirectory has an element: (DIRNAME . STARTMARKER).
 ...

Directories don't have buffer positions.

It would be clearer to say "listed subdirectories".
It's not about subdirectories.  It's about those
subdirs that are listed in the Dired buffer, and
STARTMARKER is the buffer position where such a
_listing_ starts.

The buffer position of a subdirectory isn't clear.
The buffer position of a subdirectory listing is
clear.