History of sender 1 change

In crates/hub/src/shutdown.rs, lines 28–31 on d2263e299da7b94c34efdbabdf0f5232fcb7e0ac463a85dd9987532a9b0bf718. 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 28,31:crates/hub/src/shutdown.rs.