Formatting of functions using `=>` instead of return

[nordlow]

Can we have sdfmt format

struct S {
    int ________________________________________________________(int x) => x + 1;
}

as

struct S {
    int ________________________________________________________(int x)
        => x + 1;
}

instead of current

struct S {
    int ________________________________________________________(int x) =>
    x + 1;
}

.