History of JobGroup::kill 1 change

In crates/flow/src/syscall.rs, lines 445–447 on 97b9cfeb7d66203e584c00be7499611bdf4abbfd44e2610f739a25c72a2d9076. 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.