Add args description to DatasetInfo
MEMBER
Thanks for the suggestions! I've included them and made a few minor tweaks along the way
2021-05-21T13:39:00Z
https://github.com/huggingface/datasets/pull/2384#issuecomment-845957120
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2021-05-21T13:39:00Z
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MEMBER
Please merge master into this branch to fix the CI, I just fixed metadata validation tests.
2021-05-21T13:45:15Z
https://github.com/huggingface/datasets/pull/2384#issuecomment-845961089
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Closes #2354 

I am not sure what `post_processed` and `post_processing_size` correspond to, so have left them empty for now. I also took a guess at some of the other fields like `dataset_size` vs `size_in_bytes`, so might have misunderstood their meaning.