History of build 21 changes

In crates/hub/src/lib.rs, lines 91–144 on f677d62702981b36d47c67ed494b982066280d44c3faec93af2c090ad5df4db8. 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 91,144:crates/hub/src/lib.rs.