doc "list" returns in TreeView

[Kevin Ryde <user42 zip com au>]

A couple of return values only shown as "list" in the TreeView pod:

--- GtkTreeView.xs      10 Jan 2008 09:51:09 +1100      1.47
+++ GtkTreeView.xs      29 Apr 2008 08:03:00 +1000      
@@ -793,6 +793,9 @@
 #if GTK_CHECK_VERSION (2, 8, 0)
 
 #gboolean gtk_tree_view_get_visible_range (GtkTreeView *tree_view, GtkTreePath **start_path, GtkTreePath 
**end_path);
+=for apidoc
+=for signature (path, path) = $tree_view->get_visible_range
+=cut
 void
 gtk_tree_view_get_visible_range (tree_view)
        GtkTreeView *tree_view
@@ -886,6 +889,9 @@
 void gtk_tree_view_set_tooltip_cell (GtkTreeView *tree_view, GtkTooltip *tooltip, GtkTreePath *path, 
GtkTreeViewColumn *column, GtkCellRenderer *cell);
 
 # gboolean gtk_tree_view_get_tooltip_context (GtkTreeView *tree_view, gint *x, gint *y, gboolean 
keyboard_tip, GtkTreeModel **model, GtkTreePath **path, GtkTreeIter *iter);
+=for apidoc
+=for signature (x, y, model, path, iter) = $treeview->get_tooltip_context ($x, $y, $keyboard_tip)
+=cut
 void
 gtk_tree_view_get_tooltip_context (GtkTreeView *tree_view, gint x, gint y, gboolean keyboard_tip)
     PREINIT: