issue_comments: 266015193

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https://github.com/pydata/xarray/pull/1017#issuecomment-266015193 https://api.github.com/repos/pydata/xarray/issues/1017 266015193 MDEyOklzc3VlQ29tbWVudDI2NjAxNTE5Mw== 1217238 2016-12-09T13:36:12Z 2016-12-09T13:36:12Z MEMBER

or use another symbol like o that means 'no index'?

This seems like the best alternative to me. I don't like omitting the variable name because it seems that it might fall under the previous row, like a level in the MultiIndex repr.

 
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