fix tag group usage in markups

private_includes/base/markup_tag_groups_hack.ily

@@ -9,5 +9,8 @@ tagGroup =
 
 #(define-markup-command (handle-tag-groups layout props recorded-groups m) (list? markup?)
    (resetTagGroups)
-   (every (lambda (group) (define-tag-group group)) recorded-groups)
+   (for-each
+     (lambda (group)
+       (define-tag-group group))
+     recorded-groups)
    (interpret-markup layout props m))