Poor formatting of let foo = { bar }

[ghost]

The following code:

lazy_static! {
    pub static ref BLOCKING_POOL: tokio_threadpool::ThreadPool = {
        tokio_threadpool::Builder::new().pool_size(1).build()
    };

    static ref FOO: Foo = unsafe {
        very_long_function_name().another_function_with_really_long_name()
    };
}

Gets formatted as:

lazy_static! {
    pub static ref BLOCKING_POOL: tokio_threadpool::ThreadPool =
        { tokio_threadpool::Builder::new().pool_size(1).build() };
    static ref FOO: Foo =
        unsafe { extremely_long_function_name().another_function_with_long_name() };
}

Which is much less readable to me. First, the blank line is deleted, and second, { very_long_expression } on a dedicated line doesn't look great. I think we should never break = { or = unsafe { into two lines.

[ghost]

What is even more strange is, if we add a blank comment in between the declarations, then rustfmt does nothing!

lazy_static! {
    pub static ref BLOCKING_POOL: tokio_threadpool::ThreadPool = { tokio_threadpool::Builder::new().pool_size(1).build() };

    //

    static ref FOO: Foo = unsafe { very_long_function_name().another_function_with_really_long_name() };
}

This looks like a bug.