Typo with LM Fine tuning script
Author: echan00
Pull request: yes

Typo with LM Fine tuning script

Comments:
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/1288?src=pr&el=h1) Report
> Merging [#1288](https://codecov.io/gh/huggingface/transformers/pull/1288?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/2dc8cb87341223e86220516951bb4ad84f880b4a?src=pr&el=desc) will **decrease** coverage by `3.92%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/1288/graphs/tree.svg?width=650&token=9qOlN6Hb1c&height=150&src=pr)](https://codecov.io/gh/huggingface/transformers/pull/1288?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #1288      +/-   ##
==========================================
- Coverage   84.69%   80.77%   -3.93%     
==========================================
  Files          84       57      -27     
  Lines       12596     8092    -4504     
==========================================
- Hits        10668     6536    -4132     
+ Misses       1928     1556     -372
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/1288?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [transformers/tests/conftest.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL3Rlc3RzL2NvbmZ0ZXN0LnB5) | | |
| [transformers/modeling\_tf\_transfo\_xl\_utilities.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL21vZGVsaW5nX3RmX3RyYW5zZm9feGxfdXRpbGl0aWVzLnB5) | | |
| [transformers/data/processors/utils.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL2RhdGEvcHJvY2Vzc29ycy91dGlscy5weQ==) | | |
| [transformers/modeling\_gpt2.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL21vZGVsaW5nX2dwdDIucHk=) | | |
| [transformers/tests/modeling\_tf\_openai\_gpt\_test.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL3Rlc3RzL21vZGVsaW5nX3RmX29wZW5haV9ncHRfdGVzdC5weQ==) | | |
| [transformers/modeling\_tf\_xlm.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL21vZGVsaW5nX3RmX3hsbS5weQ==) | | |
| [transformers/optimization.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL29wdGltaXphdGlvbi5weQ==) | | |
| [transformers/file\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL2ZpbGVfdXRpbHMucHk=) | | |
| [transformers/tokenization\_bert.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL3Rva2VuaXphdGlvbl9iZXJ0LnB5) | | |
| [transformers/tests/tokenization\_distilbert\_test.py](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL3Rlc3RzL3Rva2VuaXphdGlvbl9kaXN0aWxiZXJ0X3Rlc3QucHk=) | | |
| ... and [131 more](https://codecov.io/gh/huggingface/transformers/pull/1288/diff?src=pr&el=tree-more) | |

------

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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/1288?src=pr&el=footer). Last update [2dc8cb8...f7978f7](https://codecov.io/gh/huggingface/transformers/pull/1288?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).


Thanks, updated a bit to use `format`