Heavy precision problem


Like in lcb_runner/evaluation/testing_util.py

You should change the 
```python
if decimal_prediction_line == decimal_gtout_line:
```

to 
```python
if abs(decimal_prediction_line - decimal_gtout_line) < 1e-6:
    continue
```

**I found lots of false negative example while using livecodebench**


(so as the grade_stdio method