History of unlink 1 change

In crates/hub/src/signin.rs, lines 271–278 on 5d54cf746e00d45c6b6aaf56a134676c71e01469210c0d73fef3f1cc1f9bd32e. 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 271,278:crates/hub/src/signin.rs.