Subject: bug#30073: 27.0.50; dired-do-delete ignores customization for short answers

From: Eli Zaretskii <[email-masked]>
Date: Fri, 12 Jan 2018 11:57:21 +0200

> From: Juri Linkov <[email-masked]>
> Cc: "Basil L. Contovounesios" <[email-masked]>,  [email-masked]
> Date: Thu, 11 Jan 2018 23:54:41 +0200
> 
> What is worse, it doesn't work at all - setting dired-deletion-confirmer
> to y-or-n-p has no effect on the question “Recursively delete ...? ”.
> It still expects “[yes, no, all, quit, help]” answers, not short ones
> like “y/n/!/q/?”.

If you want to use y-or-n-p there, you will have to replace
dired--yes-no-all-quit-help with your own function.