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
958878760,MDExOlB1bGxSZXF1ZXN0NzAyMDgwMTg2,5667,Allow .attrs to support any dict-likes,14371165,open,0,,,10,2021-08-03T08:43:19Z,2022-10-12T18:08:25Z,,MEMBER,,1,pydata/xarray/pulls/5667,"<!-- Feel free to remove check-list items aren't relevant to your change -->

- [x] Closes #5655
- [ ] Tests added
- [ ] Passes `pre-commit run --all-files`
- [ ] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
- [ ] New functions/methods are listed in `api.rst`
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787732195,MDExOlB1bGxSZXF1ZXN0NTU2MzY2NTcx,4820,Add dataset line plot,14371165,open,0,,,10,2021-01-17T15:40:39Z,2022-06-09T14:50:17Z,,MEMBER,,1,pydata/xarray/pulls/4820,"<!-- Feel free to remove check-list items aren't relevant to your change -->

- [x] Closes #4235
- [x] Tests added
- [x] Passes `pre-commit run --all-files`
- [ ] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
- [ ] New functions/methods are listed in `api.rst`

TODO:
* markersize/linewidth should work, easy if linewidth is only defined. But the hue/linewidth combo is trickier.
  * Possible, see post further down for details. Should be done in dataarray version in a future PR.
* hue only works with coordinates. Should it work with variables? How to do that? groupby? 
  * Leave it for coordinates only for now. 
* Should lines always be sorted to avoid weird lines?
  * Handled in dataarray version 
* linewidth not shown anywhere
  * line plots doesn't have the nice `legend_elements` function that scatter has which makes it a little bit more tricky. It can still be shown in the legend though.


Adds `ds.plot.line`. The function wraps `ax.plot` which should feel pretty homely for most matplotlib users.

It was a mess getting the colorbar to work because scatter returns a mappable that colorbar can handle but plot returns a list of line2ds that it can't handle. You also can't add cmaps directly to ax.plot, so to avoid for loops I changed the default color settings instead.

Feel free to break it.

Example:
![bild](https://user-images.githubusercontent.com/14371165/104847719-244fe100-58e2-11eb-815c-46940b7fc40e.png)

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728782405,MDExOlB1bGxSZXF1ZXN0NTA5NDI2NzAy,4532,Improve Dataset and DataArray docstrings,14371165,closed,0,,,10,2020-10-24T12:46:47Z,2020-10-27T19:48:50Z,2020-10-27T19:47:51Z,MEMBER,,0,pydata/xarray/pulls/4532,"Improve docstrings of Dataset and DataArray by 
* moving the init docs to the class doc
* adding examples on how to initialize the classes with a small calculation example.


 - [x] Closes #4345 
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