Adding a doc comment inside an enum causes a change in the enum formatting

[malikolivier]

I include a reproduction of the issue in #6279.

The following minimal example is being formatted.

enum A {
    B {
        a: usize,
        b: usize,
        c: usize,
        d: usize,
    },

    /// C
    C {
        a: usize,
    },
}

The resulting format is:

enum A {
    B {
        a: usize,
        b: usize,
        c: usize,
        d: usize,
    },

    /// C
    C { a: usize },
}

However, if /// C is not included, the code is left unformatted (this is what I would expect whether /// C is there or not).

As far as I can tell, this reproducing example is minimal: for example, after removing d: usize we do not reproduce the reported behavior.

I found this issue while adding rustdocs to an existing project.
I would expect that adding a line of documentation should not cause the formatting of the code to change.

[ytmimi]

Thanks for the report. I remember something like this being reported before, but I haven't had a chance to dive into the issue tracker to find it yet.

[ytmimi]

Duplicate of #6120 and #5662