"left behind trailing whitespace" on non-meta macro attributes

[maxdexh]

Rustfmt fails with error[internal]: left behind trailing whitespace when formatting attributes that have arguments with trailing whitespace + non-meta format.

#[my_attr(aa bb   
)]    // spaces ^
fn f() {}

#[my_attr(
    aa
    
    bb // (spaces at beginning of previous line)
)]
fn f() {}

Versions tested:

• rustfmt 1.8.0-stable (29483883ee 2025-08-04)
• rustfmt 1.7.0-stable (3f5fd8d 2024-08-06)