Ensure `let-else` expression does not end with a `}`

[CohenArthur]

https://doc.rust-lang.org/reference/statements.html#let-statements

[beamandala]

Hi, I'm interested in working on this issue. I'd like to make sure I understand the issue.

Are we trying to make sure that the expression following = isn't wrapped in curly braces?

For example, is this invalid?

let Some(x) = { Some(10) } else {
    panic!("");
};