Formatting of Comment Inside Const

[davidBar-On]

Input / Output
Test comment-inside-const.rs is now:

fn issue982() {
    const SOME_CONSTANT: u32 =
        // Explanation why SOME_CONSTANT needs FLAG_A to be set.
        FLAG_A |
        // Explanation why SOME_CONSTANT needs FLAG_B to be set.
        FLAG_B |
        // Explanation why SOME_CONSTANT needs FLAG_C to be set.
        FLAG_C;
}

Expected output
Should the desired output (and input) be:

fn issue982() {
    const SOME_CONSTANT: u32 =
        // Explanation why SOME_CONSTANT needs FLAG_A to be set.
        FLAG_A
            // Explanation why SOME_CONSTANT needs FLAG_B to be set.
            | FLAG_B
            // Explanation why SOME_CONSTANT needs FLAG_C to be set.
            | FLAG_C;
}

That is, the | is put at the beginning of the line as binop_separator = "Front" is used, and the lines past FLAG_A are indented to the right, based on the current formatting of the following example:

fn main() {
    const xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx: u32 =
        yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
            | zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
            | uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu;
}

The current test should probably be formatted as something like (with binop_separator = "Front"):

fn issue982() {
    const SOME_CONSTANT: u32 =
        // Explanation why SOME_CONSTANT needs FLAG_A to be set.
        FLAG_A
            |
            // Explanation why SOME_CONSTANT needs FLAG_B to be set.
            FLAG_B
            |
            // Explanation why SOME_CONSTANT needs FLAG_C to be set.
            FLAG_C;
}

[ytmimi]

Going to close as this is a duplicate of #3167. The reason we don't format here is that we don't yet handle comments between binary operators