ferdymercury

### Explain what you would like to see improved and how. In the new TScatter class, it was found here https://root-forum.cern.ch/t/scatter-plot-with-colorbar/59562/14 that: - There is not an easy way to...

[core] proper check whether class is a TRef or TRefArray

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# This Pull request: ## Changes or fixes: Fixes https://its.cern.ch/jira/projects/ROOT/issues/ROOT-7052 reported by @olifre ## Checklist: - [ ] tested changes locally - [ ] updated the docs (if necessary)

[cling] ROOT crash with unnamed macro

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### Check duplicate issues. - [ ] Checked for duplicates ### Description A (cumbersome) macro file shown below gives an error in ROOT 6.30.06, but crashes with 6.33.01 6.30.06 ```...

### Explain what you would like to see improved and how. When a PR touches code within cling subdir, it would be great if the CI turns option clingtest ON...

CVD-friendly color maps and defaults

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## 🚀 Feature Implement CVD-friendly color maps as default (like the already existing viridis, e.g.) and 'discourage' others that are prone to show artefacts. ## Motivation From the scientific point...