History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on c863c7a7a2d14078197b5c87df8250057cc367a60ddf08b97988f1bcf27a41c1. 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.