Indentation function doesn't handle if expressions well

[michaelbartnett]

I don't have my config setup to format on save so I rely on the mode indentation a lot, and it currently will produce this:

fn sign(i: i32) i32 {
    return if (i == 0)
        0
        else if (i > 0)
        -1
        else
        -1;
}

While the preferred style according to zig fmt would be:

fn sign(i: i32) i32 {
    return if (i == 0)
        0
    else if (i > 0)
        -1
    else
        -1;
}