History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on 1df1d57a919ccd9c104d968c7fe0f7dc4403e66d95ec5a6de2f628ed697a5ea5. 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.