typo
there is no var `decoder_input_ids`, but there is `input_ids` for decoder :)

# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/6959?src=pr&el=h1) Report
> Merging [#6959](https://codecov.io/gh/huggingface/transformers/pull/6959?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/56742e9f610231d7b28fe2387770dc56014b79de?el=desc) will **decrease** coverage by `0.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/6959/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/6959?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #6959      +/-   ##
==========================================
- Coverage   80.00%   79.98%   -0.02%     
==========================================
  Files         161      161              
  Lines       30120    30120              
==========================================
- Hits        24097    24092       -5     
- Misses       6023     6028       +5     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/6959?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/generation\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/6959/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9nZW5lcmF0aW9uX3V0aWxzLnB5) | `97.21% <ø> (ø)` | |
| [src/transformers/generation\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/6959/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9nZW5lcmF0aW9uX3RmX3V0aWxzLnB5) | `83.45% <0.00%> (-1.76%)` | :arrow_down: |
| [src/transformers/file\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/6959/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9maWxlX3V0aWxzLnB5) | `82.66% <0.00%> (+0.25%)` | :arrow_up: |
| [src/transformers/data/data\_collator.py](https://codecov.io/gh/huggingface/transformers/pull/6959/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9kYXRhL2RhdGFfY29sbGF0b3IucHk=) | `92.30% <0.00%> (+0.40%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/6959?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/6959?src=pr&el=footer). Last update [56742e9...12a1792](https://codecov.io/gh/huggingface/transformers/pull/6959?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
