History of Swarm::step 1 change

In crates/backdrop/src/swarm.rs, lines 154–160 on 026a76d251ce302a7a2851dac1e4301c101948317f11876c3eae5f2942dc2844. 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 154,160:crates/backdrop/src/swarm.rs.