History of JobGroup::kill 1 change

In crates/flow/src/syscall.rs, lines 445–447 on 35cd8ccb29ea815b92f3d9160816a01ed3dba78f2a2042b3177b6100216bd64b. 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.