History of gc 4 changes

In src/cli/workspace.rs, lines 1009–1044 on dfb23a3a8cfa1fdf4f464003b8b19ed8fdfba9730896761927d7c1073f178aad. 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.