spooky extra space added when accessing fields in nested tuple structs

[BoxyUwU]

Input

struct Bar(());
struct Foo(Bar);

fn main() {
    let foo = Foo(Bar(()));

    foo.0.0;
}

Output

struct Bar(());
struct Foo(Bar);

fn main() {
    let foo = Foo(Bar(()));

    foo.0 .0;
}

Expected output

struct Bar(());
struct Foo(Bar);

fn main() {
    let foo = Foo(Bar(()));

    foo.0.0;
}

Meta

• rustfmt version: 1.4.30-nightly (acd9486 2020-12-0)
• From where did you install rustfmt?: rustup (happens on playground too)

[calebcartwright]

Duplicate of various issues (e.g. #4543), explained in #4355 (comment)