History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on 3b1dc8a974a3bec52ee77ed6fa2c00c4bc388ca5e2f673cc6c83007b017dbfad. 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.