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
2238099300,PR_kwDOAMm_X85sYXC0,8930,Migrate formatting_html.py into xarray core,51421921,closed,0,,,7,2024-04-11T16:15:28Z,2024-04-18T21:59:47Z,2024-04-18T21:59:44Z,CONTRIBUTOR,,0,pydata/xarray/pulls/8930,"This PR migrates the `formatting_html.py` module into `xarray/core/formatting_html.py` as part of the on-going effort to merge `xarray-datatree` into `xarray`.

One thing of note is that importing and setting the `OPTIONS` to `""default""` in `datatree/formatting_html.py` ([lines](https://github.com/xarray-contrib/datatree/blob/main/datatree/formatting_html.py#L13%23L15)) were moved into `xarray/core/options.py` on [#L23](https://github.com/pydata/xarray/blob/main/xarray/core/options.py#L23) and [#L49](https://github.com/pydata/xarray/blob/main/xarray/core/options.py#L49). So, I did not add them back to `xarray/core/formatting_html.py`.

- [x]  Completes migration step for `datatree/formating_htmls.py` https://github.com/pydata/xarray/issues/8572
- [x]  Tests added
- [ ]  ~~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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