History of build 4 changes

In crates/hub/src/lib.rs, lines 39–61 on 81a6254b92aff61a24aa95b736cdf908e49acca36d2a8c4f66cecee2cb146117. 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 39,61:crates/hub/src/lib.rs.