Minor/basic text fixes
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/2229?src=pr&el=h1) Report
> Merging [#2229](https://codecov.io/gh/huggingface/transformers/pull/2229?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/a1f1dce0ae511ef7766c6b6a8f5ebf9118279e73?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/2229/graphs/tree.svg?width=650&token=9qOlN6Hb1c&height=150&src=pr)](https://codecov.io/gh/huggingface/transformers/pull/2229?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master    #2229   +/-   ##
=======================================
  Coverage   81.47%   81.47%           
=======================================
  Files         122      122           
  Lines       18344    18344           
=======================================
  Hits        14946    14946           
  Misses       3398     3398
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/2229?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [transformers/data/processors/squad.py](https://codecov.io/gh/huggingface/transformers/pull/2229/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL2RhdGEvcHJvY2Vzc29ycy9zcXVhZC5weQ==) | `14.18% <0%> (ø)` | :arrow_up: |

------

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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/2229?src=pr&el=footer). Last update [a1f1dce...70dbca5](https://codecov.io/gh/huggingface/transformers/pull/2229?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>Thanks!