bug#44273: "total used in directory 19 available 5.2 GiB"

[Drew Adams]

> > Maybe it could help to show some explanation with tooltips
> > over cryptic parts of that line.
> 
> FWIW:
> 
> In my library ls-lisp+.el I use tooltips and links on
> parts of that line, and the text for that line is a
> bit different.  E.g.:
> 
>  files 1610/1610 space used 116754 available 101631612
> 
> There are two parts, with a tooltip each:
> 
> 1. files 1610/1610
> 2. space used 116754 available 101631612
> 
> Tooltip for #1:
>  Files shown / total files in directory [RET, mouse-2: more info]
> 
> Tooltip for #2:
>  Kbytes used in directory, Kbytes available on disk [RET, mouse-2: more info]
> 
> Each part also has a link, which shows *Help* with
> the `file-attributes' for the directory in tabular form.

FWIW, looking for something else I came across this
emacs-develpost from 2016, which also talks about
"files N/M", i.e., showing the number of files that 
are currently listed and the total number of files
(including hidden/omitted):

https://lists.gnu.org/archive/html/emacs-devel/2016-09/msg00277.html