Since the near-optimal spaces example is kind of my baby, I thought I'd quickly submit this, which cleans up the output significantly.

There are also a bunch of these warnings:

/home/docs/checkouts/readthedocs.org/user_builds/pypsa/envs/latest/lib/python3.13/site-packages/linopy/expressions.py:2006: FutureWarning:

In a future version of xarray the default value for join will change from join='outer' to join='exact'. This change will result in the following ValueError: cannot be aligned with join='exact' because index/labels/sizes are not equal along these coordinates (dimensions): 'name' ('name',) The recommendation is to set join explicitly for this case.

I can't quite replicate this locally so I'm not sure how they might be cleaned up from the documentation.

Checklist

• Code changes are sufficiently documented; i.e. new functions contain docstrings and further explanations may be given in docs.
• Unit tests for new features were added (if applicable).
• A note for the release notes docs/release-notes.md of the upcoming release is included.
• I consent to the release of this PR's code under the MIT license.