Comment in supertrait list causes line duplication

[CAD97]

playground link

use std::ops;

pub trait Slice
    : ops::Index<ops::Range<usize>, Output = Self>
    + ops::Index<ops::RangeFrom<usize>, Output = Self>
    + ops::Index<ops::RangeFull, Output = Self>
    + ops::Index<ops::RangeTo<usize>, Output = Self>
    // + ops::Index<ops::RangeInclusive<usize>, Output = Self>
    // + ops::Index<ops::RangeToInclusive<usize>, Output = Self>
    + ops::Index<ops::RangeTo<usize>, Output = Self> {
}

when formatted gives

use std::ops;

pub trait Slice
    : ops::Index<ops::Range<usize>, Output = Self>
    + ops::Index<ops::RangeFrom<usize>, Output = Self>
    + ops::Index<ops::RangeFull, Output = Self>
    + ops::Index<ops::RangeTo<usize>, Output = Self>
    + ops::Index<ops::RangeTo<usize>, Output = Self>
// + ops::Index<ops::RangeInclusive<usize>, Output = Self>
    // + ops::Index<ops::RangeToInclusive<usize>, Output = Self>
    + ops::Index<ops::RangeTo<usize>, Output = Self> {
}

Each subsequent format duplicates the line above the comment again.

[topecongiro]

Thank you for filing an issue, I will close this as this is a duplicate of #2055.

[CAD97]

My search has a long way to improve... I looked but did not find the preexisting report. Sorry for the dupe!