NOT token (!) inside a macro call inside `macro_rules!` erroneously de-indented (non-idempotency)

[jinohkang-theori]

Minimal reproducer:

mod ok {
    mod ok {
        const _: &'static str = stringify!(Foo: !Bar);
    }
}

macro_rules! ok_2 {
    () => {
        const _: i32 = !1;
    };
}
ok_2!();

macro_rules! fail_dedented {
    () => {
        const _: &'static str = stringify!(Foo: !Bar);
    };
}
fail_dedented!();

macro_rules! fail_dedented_nonidempotent {
    () => {
        const _: () = assert!(stringify!(Foo: !Bar).len() > 0, concat!(stringify!(Foo: !Bar), "Lorem ipsum dolor sit amet, consectetur adipiscing elit"));
    };
}
fail_dedented_nonidempotent!();

macro_rules! fail_dedented_nonidempotent_2 {
    () => {
        const _: () = assert!(stringify!(Foo: !Bar).len() > 0, concat!(stringify!(Foo: !Bar), "Lorem ipsum dolor sit amet, consectetur adipiscing elit"));
    };
}

fail_dedented_nonidempotent_2!();

formats to

mod ok {
    mod ok {
        const _: &'static str = stringify!(Foo: !Bar);
    }
}

macro_rules! ok_2 {
    () => {
        const _: i32 = !1;
    };
}
ok_2!();

macro_rules! fail_dedented {
    () => {
const _: &'static str = stringify!(Foo: !Bar);
    };
}
fail_dedented!();

macro_rules! fail_dedented_nonidempotent {
    () => {
const _: () = assert!(
            stringify!(Foo: !Bar).len() > 0,
            concat!(
                stringify!(Foo: !Bar),
                "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
            )
        );
    };
}
fail_dedented_nonidempotent!();

macro_rules! fail_dedented_nonidempotent_2 {
    () => {
const _: () = assert!(
            stringify!(Foo: !Bar).len() > 0,
            concat!(
                stringify!(Foo: !Bar),
                "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
            )
        );
    };
}

fail_dedented_nonidempotent_2!();

formats to

mod ok {
    mod ok {
        const _: &'static str = stringify!(Foo: !Bar);
    }
}

macro_rules! ok_2 {
    () => {
        const _: i32 = !1;
    };
}
ok_2!();

macro_rules! fail_dedented {
    () => {
const _: &'static str = stringify!(Foo: !Bar);
    };
}
fail_dedented!();

macro_rules! fail_dedented_nonidempotent {
    () => {
        const _: () = assert!(
    stringify!(Foo: !Bar).len() > 0,
            concat!(
        stringify!(Foo: !Bar),
                "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
            )
        );
    };
}
fail_dedented_nonidempotent!();

macro_rules! fail_dedented_nonidempotent_2 {
    () => {
        const _: () = assert!(
    stringify!(Foo: !Bar).len() > 0,
            concat!(
        stringify!(Foo: !Bar),
                "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
            )
        );
    };
}

fail_dedented_nonidempotent_2!();

[jinohkang-theori]

Not fixed by 0097a90 (PR #5473).

[ytmimi]

Thanks for reaching out. I'll see if I can look into this later to determine what's going on here