On Sun, Dec 06, 2020 at 08:57:22PM +0100, daniela-spit@gmx.it wrote:
> Notices that some code uses '$' in variable names.
> 
> What is it about?
> 
>    (let ((deactivate-mark nil) $ma $mb)

Seen from Lisp's point of view, it's just a plain normal variable.

But perhaps the code author wants to convey something to you,
the reader.

Cheers
 - t