History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on 72bf8a02369f9187aef8383096699a65eb9696f5d8bc99edbb8e88eb682785b2. 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.