History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on e4a9dc2948fc4bf2f47213482e11c1e85cc7ae4ef1d2b6b2ee299cf12faf92a1. 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 978,1013:src/cli/workspace.rs.