Function workspace_crates 

fn workspace_crates() -> Result<BTreeMap<String, bool>, Error>

Every workspace crate, and whether it is published to crates.io.

Read from each manifest’s own publish key, so the two lists in the map are the tree’s answer rather than a copy of §12’s prose — which was already wrong when this generator was written: it names four publish = false crates, and there are six.