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
523893854,MDExOlB1bGxSZXF1ZXN0MzQxNzkwMzY2,3544,Open dataset cf options conflict solving,5948670,open,0,,,0,2019-11-16T20:43:39Z,2022-06-09T14:50:17Z,,CONTRIBUTOR,,0,pydata/xarray/pulls/3544,"It took some time*, but here is a suggestion to solve option conflicts in xarray.open_dataset().

If any of the options `mask_and_scale`, `decode_times`, `concat_characters`, or `decode_coords` is manually set and contradicts the manually set choice of `decode_cf` a `ValueError` will be raised.
This commit requires to change some option default values of open_dataset() parameters from `True` to `None`. I hope this is acceptable. 

 - [x] Closes #3020 
 - [x] Tests added
 - [x] Passes `black . && flake8` (`mypy`passes in principle, but backends/api.py:21 has an unrelated error)
 - [x] Fully documented, 
 - [ ] including `whats-new.rst` for all changes and `api.rst` for new API

What do you think? Do I have to add something to `whats-new.rst` and `api.rst`?

PS: (*) This is my first PR of this kind and I wanted to build it in a proper testing environment, but I had to set this up first.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3544/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
564033048,MDExOlB1bGxSZXF1ZXN0Mzc0MzM1Mzc0,3766,Allow plotting bool data,5948670,closed,0,,,0,2020-02-12T14:22:11Z,2020-04-03T23:19:23Z,2020-04-03T23:19:23Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3766,"as @dcherian said:

> matplotlib can plot `bool` values so we should add that to the check in `_ensure_plottable`.

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

 - [x] Closes #3722 

","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3766/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull