Code snippet
```rust
fn main() {
    //√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√√
}
```

has length of 191, but consists of 87 chars, and the debug code with
`.truncate(100)` panicked.
Fixed that issue, cc @KCaverly 


Release Notes:

- N/A