Fixed current page ancestor menu item

reference:
http://codex.wordpress.org/Function_Reference/wp_list_pages#Current-Page_Ancestor_Menu_Items
http://codex.wordpress.org/Function_Reference/wp_nav_menu#Current-Page_Menu_Items

library/scss/breakpoints/_base.scss

@@ -237,7 +237,7 @@ and more scalable.
 	/* highlight current page */
 	li.current-menu-item,
 	li.current_page_item,
-	li.current-page-ancestor {
+	li.current_page_ancestor {
 
 		a {}
 
@@ -885,4 +885,4 @@ FOOTER STYLES
 	} /* end .footer-links */
 
 
-	.copyright {}
+	.copyright {}