copy coords before modifying

[tspeng]

Description

Make a copy of the dictionary coords, so the input parameter coords is not modified.

This PR is to fix the issue mentioned in issue #2047

---

📚 Documentation preview 📚: https://arviz--2160.org.readthedocs.build/en/2160/

[codecov]

Codecov Report

Merging #2160 (0735687) into main (6e8c8ab) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 0735687 differs from pull request most recent head 8a91839. Consider uploading reports for the commit 8a91839 to get more accurate results

@@           Coverage Diff           @@
##             main    #2160   +/-   ##
=======================================
  Coverage   90.68%   90.68%           
=======================================
  Files         120      120           
  Lines       12678    12679    +1     
=======================================
+ Hits        11497    11498    +1     
  Misses       1181     1181           

Impacted Files	Coverage Δ
arviz/plots/ppcplot.py	89.33% <100.00%> (+0.14%)	⬆️
arviz/stats/__init__.py	100.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[ahartikainen]

Small update to changelog and this is ready

[OriolAbril]

Same comment as @ahartikainen. Thanks for the PR. You only need to add one line to https://github.com/arviz-devs/arviz/blob/main/CHANGELOG.md#maintenance-and-fixes and it will be ready to merge.

[tspeng]

@ahartikainen and @OriolAbril Thank you for the comments. I just added one line to the changelog. Let me know if it works.

[ahartikainen]

Thanks, everything looks good.

I cleaned the commits a bit using git fetch --all and git rebase -i upstream/main (so you get the latest changes without including the commits, assuming you have upstream defined).

[tspeng]

@ahartikainen Thank you for making the PR much cleaner. Just for a learning purpose, how did you choose the keywords after "git rebase -i upstream/main" ? I guess you "pick" the two remaining commits. Did you drop the other two commits?

[ahartikainen]

Yes

[tspeng]

Got it, thanks a lot!