Core\Router()->toUrl() function is adding extra slash (URL separator)

[rozalia]

The issue is due to inserting Core\Config()->ROUTER['separator'] even if the current mode has no prefix (e.g the default app).

Possible fix would be to amend the $mode['url'] before using it to format the URL:

$mode['url'] = $mode['url'] ? $mode['url'] . Core\Config()->ROUTER['separator'] : '';