issue_comments: 435676969

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https://github.com/pydata/xarray/issues/2537#issuecomment-435676969 https://api.github.com/repos/pydata/xarray/issues/2537 435676969 MDEyOklzc3VlQ29tbWVudDQzNTY3Njk2OQ== 5308236 2018-11-04T15:04:03Z 2018-12-01T20:06:11Z NONE

I think the issue stems from this line of code. Removing it leads to the desired MultiIndex. But I'm not sure if it leads to downstream issues, e.g selecting over coord1 then seems to also squeeze that dimension. Perhaps @benbovy and @jhamman can chime in as the owners of that line.

 
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