bug#50187: 28.0.50; tramp is called from calendar

[Gregory Heytings]

> If starting calendar while in a Tramp buffer is problematic for you, 
> then I think the solution is to not do that, I'm afraid.

Or to use this, for example:

(advice-add
 'calendar :around
 (lambda (fun &rest args)
   (let ((default-directory
          (if (file-remote-p default-directory)
              "~/"
            default-directory)))
     (apply fun args))))