History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on 4941f24007ffd67c01bcfd124def879272ed928f2d8d3866921ab7e5426d7c0f. 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.