History of gc 4 changes

In src/cli/workspace.rs, lines 1009–1044 on 2951f8023f4062b2a70c2ff3a12e7c75784336614de339a33a1b5f3a9f1c555e. 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 1009,1044:src/cli/workspace.rs.