Rustfmt adds extra semicolon after type_macro invocation

[Marwes]

Before

macro_rules! test {
    ($($t: expr)*) => { i32 }
}

type Test = test!{
    123
};

After

macro_rules! test {
    ($($t: expr)*) => { i32 }
}

type Test = test!{
                123
            };;

This unfortunately breaks the code since ;; is invalid.

[topecongiro]

This is similar to #2290. Once rust-lang/rust#46835 gets merged this will be fixed by rustup update nightly && cargo install --force rustfmt-nightly.

[topecongiro]

Closed via rust-lang/rust#46835 and #2297.