History of main 2 changes

In crates/hub/build.rs, lines 4–22 on b6dfcb61cf5eb499420b7eee55ed6c6ca61af5e2e9f2b24772ad793e5f8a328a. 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.