History of JobGroup::kill 1 change

In crates/flow/src/syscall.rs, lines 445–447 on cd03b9844516b897d4bff8031407b3b25383ec9f1faa1f75a97fdfa1e14ec482. 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 445,447:crates/flow/src/syscall.rs.