Issue with drop in https://tourofrust.com/54_en.html

[mukul1203]

Seems like foo_a is not dropped where the comment mentions.
Rather, it is dropped at the very end of the scope, after foo_b.
Confirmed it by implementing Drop trait for struct Foo

impl Drop for Foo {
    fn drop(self:&mut Self) {
        println!("Dropping");
    }
}