Empty nbest_predictions.json for run_squad.py
This is due to extra indentation on line 623 in run_squad.py 
It should be outside of the "if else" loop. 
Good catch! Do you want to submit a PR? Otherwise, I'll fix it in the next release.<|||||>Hi @thomwolf 
The issue still persists, there were two extra indentations and you removed only one to move the line out of inner if-else but, one more indentation should be removed to bring [L620](https://github.com/huggingface/pytorch-pretrained-BERT/blob/master/examples/run_squad.py#L620) out of outer if-else. Doing this produces non-empty `nbest_predictions.json` file.