Don't save model without training (example/run_squad.py bug)
There is a mirror bug in run_squad.py.
The model should not be saved if only do_predict.
# [Codecov](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923?src=pr&el=h1) Report
> Merging [#923](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/pytorch-transformers/commit/a7b4cfe9194bf93c7044a42c9f1281260ce6279e?src=pr&el=desc) will **decrease** coverage by `0.03%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923/graphs/tree.svg?width=650&token=9qOlN6Hb1c&height=150&src=pr)](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master     #923      +/-   ##
==========================================
- Coverage   79.22%   79.19%   -0.04%     
==========================================
  Files          38       38              
  Lines        6406     6406              
==========================================
- Hits         5075     5073       -2     
- Misses       1331     1333       +2
```


| [Impacted Files](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pytorch\_transformers/tokenization\_bert.py](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923/diff?src=pr&el=tree#diff-cHl0b3JjaF90cmFuc2Zvcm1lcnMvdG9rZW5pemF0aW9uX2JlcnQucHk=) | `94.17% <0%> (-0.98%)` | :arrow_down: |

------

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> Powered by [Codecov](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923?src=pr&el=footer). Last update [a7b4cfe...40aa709](https://codecov.io/gh/huggingface/pytorch-transformers/pull/923?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>Ok, could you fix that also in the `run_glue` example?<|||||>@thomwolf ```run_glue```  is correct.<|||||>@thomwolf I just solved conflicts<|||||>This looks good to me, thanks!