History of gc 4 changes

In src/cli/workspace.rs, lines 1009–1044 on 8457a6cc6984a1797e45de459316403306ec4c6e4d30427d7ff0bf68caff4fa7. 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 1009,1044:src/cli/workspace.rs.