History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on 57dfc51417fd8197355ec87c59938192ff1d2348cad1818f681a77fb7c16ef09. 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.