Kai,
With the old exporter, you could make your own
special-string and convert it.
In init.el:
--------------------------------------------------
;; For old exporter: C-c C-e h
(eval-after-load "org"
'(setq org-export-html-special-string-regexps
(append org-export-html-special-string-regexps
'(("-nd-" . "--")))))
--------------------------------------------------
I've not been able to get special-strings working with
the new exporter, but it should be something like:
--------------------------------------------------
;; For new exporter (but not yet)
(eval-after-load "org"
'(setq org-e-html-special-string-regexps
(append org-e-html-special-string-regexps
'(("-nd-" . "--")))))
--------------------------------------------------
HTH
-BC
