Misleading Ferris in Ch03 - 02

In a code block in Chapter 03 - 02, A Ferris is shown indicating that the code doesn't compile when it does.

[carols10cents]

This has been fixed but the fix hasn't ridden the Rust release trains to stable yet. You can read the updated version at https://doc.rust-lang.org/nightly/book/ch03-02-data-types.html (note nightly in the URL instead of stable).

Thanks!