bug#62790: 29.0.60; WEBP header regexp in image-type-header-regexps fails files containing newlines

[Eli Zaretskii]

> From: Visuwesh <visuweshm@gmail.com>
> Cc: 62790@debbugs.gnu.org
> Date: Wed, 12 Apr 2023 22:22:29 +0530
> 
> [புதன் ஏப்ரல் 12, 2023] Eli Zaretskii wrote:
> 
> > Thanks, but please show a recipe, starting from "emacs -Q", to
> > reproduce the problem with this image.  I just visited it with
> > "C-x C-f" and didn't see any problems.
> 
> Please evaluate
> 
>     (create-image
>         (with-temp-buffer
>             (insert-file-contents-literally "/path/to/attached/image")
>             (buffer-string))
>         nil t)
> 
> in emacs -Q and observe the return value.  It will return nil even
> though it is a valid webp file.  The reason C-x C-f succeeds is because
> the file has the "webp" extension and thusly `image-supported-p' call in
> `image-type' returns non-nil.

Thanks, installed on the emacs-29 branch, and closing the bug.