geiser-edit-symbol-at-point

[jgart]

Hi,

Does geiser-edit-symbol-at-point work for anyone?

I've never been able to get it to work with the guix codebase...

relevant config I have in my ~/.emacs:

```
(with-eval-after-load 'geiser-guile
  (add-to-list 'geiser-guile-load-path "~/guix"))
```