History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on 370c7584e299782cd582c6eda3d4af080002527722007f49855c3a2be28a1e7f. 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.