History of build 4 changes

In crates/hub/src/lib.rs, lines 41–63 on fd3db644df22ab7cfb1f7a7426ca4b00000e59c4dbd2149c56ad158fd0d083f0. 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.