History of hello 1 change

In crates/flow/src/swarm.rs, lines 438–444 on v0.5.1. 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 438,444:crates/flow/src/swarm.rs.