unwrap_block deleting too much

[Heinenen]

When the code inside a block has only one line, using the unwrap_block function sometimes causes rust-analyzer to cut the beginning and end of the line.

Some examples that I tested:

fn unwrap() -> i32 {
    if 2 > 1 {$0
        return 3;
    }
    5
} // transforms into

fn unwrap() -> i32 {
    eturn$0
    5
}

fn unwrap() -> i32 {
    if 2 > 1 {$0
        3
    } else {
        5
    }
}
// throws error "server panicked: byte index 18446744073709551615 is out of bounds of ``"

fn unwrap() -> i32 {
    if 2 > 1 {$0
        println!("");
    }
    5
} // works as intended

fn unwrap() -> i32 {
    println!("$0");
    5
}

rust-analyzer version: db2a708 2021-12-13 stable

rustc version: 1.57.0 (f1edd0429 2021-11-29)