format_secondary_markup

Sets the secondary text of the message dialog.

The message_format is assumed to contain Pango markup.

Due to an oversight, this function does not escape special XML characters like [ctor@Gtk.MessageDialog.new_with_markup] does. Thus, if the arguments may contain special XML characters, you should use printf_escaped to escape it.

```c char *msg;

msg = g_markup_printf_escaped (message_format, ...); gtk_message_dialog_format_secondary_markup (message_dialog, "s ", msg); g_free (msg); ```

Parameters:

this	a `GtkMessageDialog`
message_format	printf-style string with Pango markup
...	arguments for message_format