History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on 8349c327fe830af77bf0a837f70ad5dee39ef26819619b06be67aeb3b8364165. 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.