History of gc 4 changes

In src/cli/workspace.rs, lines 978–1013 on d14d78326300e4f23eee06b350af156ebd11a345da3dcb986dc63c7660f94f75. 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.