bug#64656: 29.0.91; Doc of minibuffer histories and completing-read - automatic addition of completions to DEFAULT list

[Juri Linkov]

>> I guess not many users customize 'completions-sort' to nil.
>> Otherwise someone may notice that the order of unsorted files
>> is reversed from the output of `ls -U`.  This could be fixed by:
>
> The order is not reverse here, AFAICT, so please show a reproducible
> recipe to make sure we are on the same page regarding this change.

A recipe is to customize `completions-sort' to nil ("No sorting"),
then first call `M-& ls -U RET' and afterwards `C-x C-f TAB TAB'
and compare the contents of two buffers *Async Shell Command*
and *Completions*.  The order of files is reversed.