(defun sacha/try-expand-emacs-wiki-name (old)
  "Expand a wiki name."
  (unless old
    (he-init-string (he-dabbrev-beg) (point))
    (setq he-expand-list
          (if (derived-mode-p 'emacs-wiki-mode)
              (delq nil
                    (mapcar
                     (lambda (item)
                       (when (string-match
                              (concat "^" (regexp-quote he-search-string))
                              (car item))
                         (planner-make-link (car item))))
                     (emacs-wiki-file-alist))))))
  (while (and he-expand-list
              (or (not (car he-expand-list))
                  (he-string-member (car he-expand-list) he-tried-table t)))
    (setq he-expand-list (cdr he-expand-list)))
  (if (null he-expand-list)
      (progn
        (if old (he-reset-string))
        nil)
    (progn
      (he-substitute-string (car he-expand-list) t)
      (setq he-expand-list (cdr he-expand-list))
      t)))

../../notebook/emacs/hippie-config.el