#3158 (Apr 27, 2021, 7:29:51 PM)

1. linked fns warn if not united, allow substitutions for linked vecfns (commit: 8122939) (details / githubweb)
2. small fixes (commit: 353cb75) (details / githubweb)
3. addd test (commit: 9bb3990) (details / githubweb)
4. only add gradients if there's truthy tags (commit: 7f95279) (details / githubweb)
5. clean up warnings (commit: cb07628) (details / githubweb)
6. closes #1522 (commit: 8283615) (details / githubweb)
7. fix diff, repeatable test printing (commit: 68a48f0) (details / githubweb)

GitHub pull request #1543 of commit 68a48f07a81e56a6c4e66120333156393a36fdaa, no merge conflicts.