History of gc 5 changes

In src/cli/workspace.rs, lines 1037–1072 on a07f60a37fb21005b17ecb3bcca6fb906c70307110b9211030ebaa9246bc8ada. 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 1037,1072:src/cli/workspace.rs.