History of main 2 changes

In crates/hub/build.rs, lines 4–22 on 8aafd2023decfd2ce80727176547f3bd8c58f0c24b0311819202489f4d882537. 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 4,22:crates/hub/build.rs.