History of Swarm::label 1 change

In crates/backdrop/src/swarm.rs, lines 167–169 on 2c31915f5c895708d14d724527c202339c80b97ac4a68f02efc68e40c5fb4903. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 167,169:crates/backdrop/src/swarm.rs.