`Config::load_or_default()` is disliked by Clippy

[piccoloser]

This is how the examples currently recommend formatting Config::load_or_default():

Config::load_or_default(CONFIG_INI, || {
    return sectioned_defaults! {
    // ...
    };
})

Clippy recommends removing the unneeded return statement. Doing so, however, leads to errors because sectioned_defaults! and general_defaults! don't return anything. The only other option that isn't flagged by Clippy is formatting the closure this way:

Config::load_or_default(CONFIG_INI, || sectioned_defaults! {
    // ...
})

However, running cargo fmt changes it to this:

// Does not compile
Config::load_or_default(CONFIG_INI, || {
    sectioned_defaults! {
        // ...
    }
})

This adds curly braces around the macro and breaks the function execution immediately.