transformers cli default flag fix
Author: ArjunPimpale
Pull request: yes

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Fixes the feature update mentioned in #41731 


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@Wauplin 

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As discussed in #41731 


Comments:
Willing to update the docs as well like mentioned at #41731 once #41459 is merged.

Thanks @ArjunPimpale ! Sorry didn't have the time to try the CLI myself. Is 

```
echo -e "Plants create [MASK] through a process known as photosynthesis." | transformers run --task fill-mask --model google-bert/bert-base-uncased --device 0
```

working as expected now? :) 

> Thanks @ArjunPimpale ! Sorry didn't have the time to try the CLI myself. Is
> 
> ```
> echo -e "Plants create [MASK] through a process known as photosynthesis." | transformers run --task fill-mask --model google-bert/bert-base-uncased --device 0
> ```
> 
> working as expected now? :)

Yup it works perfectly but this is not the command , let me explain. I noticed that the `--task` flag is not listed in the `transformers run --help` output, which likely means it has been deprecated and no longer functions as expected (likely due to #41487).

Running the command without the `--task` flag works correctly, for example:

`echo -e "Plants create [MASK] through a process known as photosynthesis." | transformers run fill-mask --model google-bert/bert-base-uncased --device 0`

Output:-
<img width="1100" height="291" alt="image" src="https://github.com/user-attachments/assets/40c2a51d-6fb6-44ba-a23d-f70e0a524c61" />

Which looks good to me.  ( works in my branch which I tried to pr) 

This is why I originally raised the issue as a documentation bug — since the `--task` flag is still mentioned in several places, it may need to be updated or removed for consistency.

Hope this clarifies things :)
thanks




The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_41761). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

Thanks @Wauplin for your time.