History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on eae5955688324d78eb8ad267b9a81cacecb39a502e2f808ab80cbd36a04341a5. 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.