History of main 2 changes

In crates/hub/build.rs, lines 4–22 on 64e5964e9f132a1a209dd85292a1671d9324cd5cc3786d094ab12d18c9377f1e. 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.