History of main 2 changes

In crates/hub/build.rs, lines 4–22 on f28389bd6aabb9fe6ca2af4a99ff344672ec5032b80cf05562c3e7cce8d59561. 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.