Should sub-routers automatically remove trailing slash?

[Tectu]

When dealing with subrouters, one might have something like this:

sub_router->add(method::get, "", [this](const auto req&) { /* ... */ });
router->add_subrouter("/foo", sub_router);

When a user then navigates to http://<base_url>/foo/ the server will respond with 404 - The resource '' was not found..

I'm wondering whether sub-routers should automatically drop trailing slashes before handling a request. This needs to be checked against the HTTP specification.