bug#20195: 25.0.50; Let Dired commands such as `dired-do-search' (`A') use prefix arg

[Filipp Gunbin <fgunbin@fastmail.fm>]

On 31/03/2015 14:22 -0700, Drew Adams wrote:

>   If ARG is a cons with element 16, 64, or 256, corresponding to
>    `C-u C-u', `C-u C-u C-u', or `C-u C-u C-u C-u', then use all files
>    in the Dired buffer, where:
>      16 includes NO directories (including `.' and `..')
>      64 includes directories EXCEPT `.' and `..'
>     256 includes ALL directories (including `.' and `..')

Isn't it simpler to mark all files in a subdir (`* s') or just toggle
everything with `t' and then invoke the command?

A movement command is ok to take argument specifying a number of files,
because that number is related to that command's main purpose.  But here
files are collected according to marks set in the buffer, so it's kind
of duplication to provide the same functionality via prefix argument.

Filipp