Empty line after comment is removed

[jplatte]

When there is an empty line after a comment in a struct declaration or struct literal, it is removed. This happened to me in a struct where fields are grouped logically, as in this example:

struct MyStruct {
    field1: String,
    field2: usize,
    field3: MyType,
    // This group ends here, and I want this comment to be attached to its end

    field4: f64,
    field5: f64,
    field6: f64,
}

Running rustfmt on the code above removes the empty line, destroying the logical grouping of the fields.

[pyrrho]

#5916 was closed as Not Planned rather than Duplicate. Since this issue and #4930 haven't been closed as such, is it safe to assume preserving this class of whitespace would be an acceptable change to rustfmt's configurations?