History of JobGroup::kill 1 change

In crates/flow/src/syscall.rs, lines 446–448 on 67851a868a3b06eb7cf6dd158a97de532a647c91ce66ba8ec1f1f83be3b8e238. 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 446,448:crates/flow/src/syscall.rs.