History of HubBackend::open 4 changes

In crates/hub/src/protocol.rs, lines 193–210 on b7e1be264c0a3716d74499fe4ffe821a2532967fe5aca40b3e49aa054691fb08. 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 193,210:crates/hub/src/protocol.rs.