```rust title="main.rs" {2}
fn main() {
    println!("Hello, world!");
}
```

```ts title="main.ts" showLineNumbers diff
const main = () => {
  ;-console.log("hello, wolrd!")
  ;+console.log("Hello, world!")
}
```

```java showLineNumbers
class Main {
    public static void main(String[] args) {
        System.out.println("Hello, world!");
    }
}
```