Fix indentation after an array literal

[ANtlord]

Let's consider this case

fn walk() {
    let positions = [
        [0.0, 0.0, 0.0],
        [2.0, 5.0, -15.0],
        [-1.5, -2.2, -2.5],
        [-3.8, -2.0, -12.3],
    ];

        let speed = 123;
}

As you might see let speed = 123 stays in the wrong position because it's treated by cindent called in the end of the function. The patch makes it this way

fn walk() {
    let positions = [
        [0.0, 0.0, 0.0],
        [2.0, 5.0, -15.0],
        [-1.5, -2.2, -2.5],
        [-3.8, -2.0, -12.3],
    ];

    let speed = 123;
}

[rust-highfive]

r? @da-x

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