Rustfmt adds extra semicolon after type_macro invocation

### Before
```rust
macro_rules! test {
    ($($t: expr)*) => { i32 }
}

type Test = test!{
    123
};
```

### After

```rust
macro_rules! test {
    ($($t: expr)*) => { i32 }
}

type Test = test!{
                123
            };;
```

This unfortunately breaks the code since `;;` is invalid.