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                        Pimp lua examples (addresses issues #640 #839)
- [ ] Further work to do here is stated elsewhere starting at https://github.com/pgf-tikz/pgf/issues/640#issuecomment-645994493
Closes #640 Closes #755 Closes #881
The CI failure is a bug in l3backend.
I edited the issue description to close the other relevant issues and PRs. Please go over them once if I did the right ones. Then ready when you are ready.
The mentioned issues and pull requests are right, thank you. While the last two could already be merged, the first one will still take a while I guess (as is also mentioned in the first comment here).