Don't produce redundant set-participant statements

[kwannoel]

In GitLab by @AlexKnauth on Apr 27, 2021, 02:27

Don't produce redundant set-participant statements, and include the label as part of the set-participant statement.

In the future: bind-participant for accepting a new participant in choice?

In the future: For each path from one set-participant to the next, generate consensus assembly, possibly more generic than existing assembly?