History of gc 4 changes

In src/cli/workspace.rs, lines 988–1023 on e3d1387619738ec8c089a32f205ed3559848a0fcc4fe95f80c4f752660e9fe95. 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 988,1023:src/cli/workspace.rs.