bug#22991: 25.0.92: C-u C-s does not display "Regexp I-search:" in the echo area

[Eli Zaretskii]

> From: Kaushal Modi <kaushal.modi@gmail.com>
> Date: Fri, 11 Mar 2016 15:58:20 -0500
> Cc: 22991@debbugs.gnu.org, Artur Malabarba <arturmalabarba@gmail.com>
> 
>  What if search-default-mode is t, i.e. the default is regexp search?
> 
> It works fine in that case too (with this patch).
> 
> When search-default-mode is set to t, doing just C-s will now begin regexp 
> isearch showing "Regexp
> I-search:" in the minibuffer.

Which I think is wrong, since the default mode shouldn't show anything
except "I-search: ".  Right?