History of build 4 changes

In crates/hub/src/lib.rs, lines 41–63 on cefb0ea24511445166d0db129929255276092d452c7832e877235b49fcdc5881. 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 41,63:crates/hub/src/lib.rs.