alt="""""

Most WYSIWYG editors prompt content contributors to add alt text whenever an image is added to a 'page'.

Seen in the wild: a contributor who knew that the image was 'decorative', and that decorative images required "alt equals quote, quote", and so added that via the WYSIWYG editor, resulting in alt="""".

aXe-core needs a new rule that looks for that string, and kicks our either a warning or a SC 1.1.1 violation whenever present.