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
509486175,MDExOlB1bGxSZXF1ZXN0MzMwMDQxNjM2,3418,change ALL_DIMS to equal ellipsis,5635139,closed,0,,,9,2019-10-19T17:46:55Z,2019-10-25T17:16:33Z,2019-10-25T15:15:47Z,MEMBER,,0,pydata/xarray/pulls/3418," - [x] Closes https://github.com/pydata/xarray/issues/3414
 - [x] Passes `black . && mypy . && flake8`
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API

This is a more drastic version of the suggested change, making `xr.ALL_DIMS` equal the ellipsis, `...`. 

The only downside I can see is that printing `xr.ALL_DIMS` will print `...`. The upside is that we get compat 'for free'","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3418/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull