adding masahaner dataset
CONTRIBUTOR
Thank you for the review. 
2021-06-10T09:06:23Z
https://github.com/huggingface/datasets/pull/2465#issuecomment-858450568
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CONTRIBUTOR
Thanks a lot for the corrections and comments. 

I have resolved point 2. The make style still throws some errors, please see below

black --line-length 119 --target-version py36 tests src benchmarks datasets/**/*.py metrics
/bin/sh: 1: black: not found
Makefile:13: recipe for target 'style' failed
make: *** [style] Error 127

Can you help to resolve this?
2021-06-10T09:34:38Z
https://github.com/huggingface/datasets/pull/2465#issuecomment-858469908
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CONTRIBUTOR
Thank you very much @lhoestq for the help. 
2021-06-14T14:35:22Z
https://github.com/huggingface/datasets/pull/2465#issuecomment-860735528
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Adding Masakhane dataset https://github.com/masakhane-io/masakhane-ner 

@lhoestq , can you please review