Generalize `geiser-edit-symbol-at-point'
- elisp/geiser-edit.el (geiser-edit-symbol-at-point): Forward to
geiser-edit-goto-symbol'. (geiser-edit-goto-symbol): New defun, copied from
geiser-edit-symbol-at-point'.
geiser-edit-goto-symbol'. (geiser-edit-goto-symbol): New defun, copied from
geiser-edit-symbol-at-point'.