bug#7617: 24.0.50; `expand-file-name': removal of slashes

[Drew Adams]

> > Can you tell me how to get that behavior?
> 
> Whatfor?  I cannot think of _any_ useful use.

The class of useful uses is not limited to those you can think of, your
Excellency.

But I take it that you have nothing to say about how to obtain this behavior in
Lisp.