Fixed.

diff --git a/lisp/riece-alias.el b/lisp/riece-alias.el
index 0575db8..c55d045 100644 (file)
--- a/lisp/riece-alias.el
+++ b/lisp/riece-alias.el
@@ -105,16 +105,21 @@
        length)
     (while (and (null prefix)
                (string-match
-                (concat (regexp-quote riece-alias-alternate-separator) "+")
+                (concat "\\("
+                        (regexp-quote riece-alias-alternate-separator)
+                        "\\)+")
                 string index))
-      (setq length (- (match-end 0) (match-beginning 0))
+      (setq length (/ (- (match-end 0) (match-beginning 0))
+                     (length riece-alias-alternate-separator))
            string (replace-match
                    (mapconcat #'identity
                               (make-list (/ length 2)
                                          riece-alias-alternate-separator)
                               "")
                    nil t string)
-           index (+ (match-beginning 0) (/ length 2)))
+           index (+ (match-beginning 0)
+                    (* (/ length 2)
+                       (length riece-alias-alternate-separator))))
       (unless (zerop (% length 2))
        (setq prefix (substring string 0 index))))
     (if (null prefix)