#2309 (Dec 1, 2020, 4:18:02 PM)

1. allow partial vectorvar substitutions (commit: f318ccd) (details / githubweb)
2. lint (commit: c3074b5) (details / githubweb)
3. add shape check (commit: 17394aa) (details / githubweb)
4. whoops, snuck in some code from another branch (commit: 861bced) (details / githubweb)

GitHub pull request #1531 of commit 17394aad53e00693b445d418ce56671ad4a53524, no merge conflicts.