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
640740029,MDExOlB1bGxSZXF1ZXN0NDM2MDk0MjQ3,4163,silence UnitStrippedWarnings,14808389,closed,0,,,7,2020-06-17T21:02:16Z,2020-07-02T17:29:28Z,2020-07-02T16:13:59Z,MEMBER,,0,pydata/xarray/pulls/4163,"Now that the tests are cleaned up, it is time to fix the numerous ""unit stripped"" warnings. We'll get there by promoting all `UnitStrippedWarning`s to errors (using `filterwarnings`) and fixing / xfailing the failing tests.

 - [x] Passes `isort -rc . && black . && mypy . && flake8`
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API
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