History of gc 4 changes

In src/cli/workspace.rs, lines 1009–1044 on 8f6b03b28e40f7d144ff5d4cf26910ad6b66458a803603458506a1266c7702c2. 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.