Starting Guide Copy Code broken

[KraftRicardo]

Just started reading your guide and I noticed that clicking the copy code button gives different text compared to what is actually shown. I have not tested every box, but in the first chapter alone at least 3 of the code boxes are "broken".

When i click the copy button I get this text:

#![allow(unused)]
fn main() {
#[inline]
fn fibonacci(n: u64) -> u64 {
    match n {
        0 => 1,
        1 => 1,
        n => fibonacci(n-1) + fibonacci(n-2),
    }
}
}