issues: 389685381

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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
389685381 MDExOlB1bGxSZXF1ZXN0MjM3NjE4MzYx 2598 Fix wrong error message in interp() 691772 closed 0     2 2018-12-11T10:09:53Z 2018-12-11T19:29:03Z 2018-12-11T19:29:03Z CONTRIBUTOR   0 pydata/xarray/pulls/2598

This is just a minor fix of a wrong error message. Please let me know if you think that this is worth testing in unit tests.

Before:

```

import xarray as xr d = xr.DataArray([1,2,3]) d.interp(1) ... ValueError: the first argument to .rename must be a dictionary ```

After: ```

import xarray as xr d = xr.DataArray([1,2,3]) d.interp(1) ...

ValueError: the first argument to .interp must be a dictionary ```

 
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