9.3
docs: Add comma to all uses of "e.g." in contributor docs.
docs: Rename setup-vagrant.md -> setup-recommended.md.
docs: Upgrade development environment page to use synced tabs.
docs: Update CZO links from stream to channel in docs and comments.
documentation: Revise uses of "e.g.," followed by a colon.
documentation: Modify cases of "[a-zA-Z] e\.g\.," for readability.