id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
471409673,MDU6SXNzdWU0NzE0MDk2NzM=,3158,Out of date docstring for concat_dim in open_mfdataset,17169544,open,0,,,3,2019-07-23T00:01:05Z,2021-07-08T17:40:45Z,,CONTRIBUTOR,,,,"In the `open_mfdataset` [docstring](https://github.com/pydata/xarray/blob/f7e299f665dada1934e0f53d4294902103dcec74/xarray/backends/api.py#L608):

```
    concat_dim : str, or list of str, DataArray, Index or None, optional
        Dimensions to concatenate files along.  You only
        need to provide this argument if any of the dimensions along which you
        want to concatenate is not a dimension in the original datasets, e.g.,
        if you want to stack a collection of 2D arrays along a third dimension.
        ...
```

This is true for the default `combine='_old_auto'`, but when using `combine='nested'` it is required while it is not used by `combine='by_coords'`.  It would be clearer to make that distinction here.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3158/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,issue