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
650236784,MDExOlB1bGxSZXF1ZXN0NDQzNzY5MDc1,4195,"Propagate attrs with unary, binary functions",2448579,closed,0,,,6,2020-07-02T22:31:42Z,2020-10-14T16:29:57Z,2020-10-14T16:29:52Z,MEMBER,,0,pydata/xarray/pulls/4195,"Closes #3490
Closes #4065
Closes #3433
Closes #3595

<!-- Feel free to remove check-list items aren't relevant to your change -->

 - [x] Tests added
 - [x] Passes `isort -rc . && black . && mypy . && flake8`
 - [x] User visible changes (including notable bug fixes) are documented in `whats-new.rst`

Still needs work but I thought I'd get opinions on defaults and the approach.
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