[http] customizable requests user-agent
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/2231?src=pr&el=h1) Report
> Merging [#2231](https://codecov.io/gh/huggingface/transformers/pull/2231?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/a5a06a851e1da79138e53978aa079a093f243dde?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `77.77%`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/2231/graphs/tree.svg?width=650&token=9qOlN6Hb1c&height=150&src=pr)](https://codecov.io/gh/huggingface/transformers/pull/2231?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #2231      +/-   ##
==========================================
- Coverage   81.43%   81.42%   -0.01%     
==========================================
  Files         122      122              
  Lines       18338    18348      +10     
==========================================
+ Hits        14933    14940       +7     
- Misses       3405     3408       +3
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/2231?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [transformers/file\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/2231/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL2ZpbGVfdXRpbHMucHk=) | `71.36% <77.77%> (-0.07%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/2231?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/2231?src=pr&el=footer). Last update [a5a06a8...15d897f](https://codecov.io/gh/huggingface/transformers/pull/2231?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
