html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/4763#issuecomment-754088719,https://api.github.com/repos/pydata/xarray/issues/4763,754088719,MDEyOklzc3VlQ29tbWVudDc1NDA4ODcxOQ==,49512274,2021-01-04T16:52:15Z,2021-01-04T16:52:15Z,NONE,"ok I missread the documentation.
Adding 

```
xr.set_options(keep_attrs=True)
```

copy attributes correctly.

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