History of gc 4 changes

In src/cli/workspace.rs, lines 988–1023 on 2bdfb3f99aee8549b4ffda324458136415c82af8151f7f7207c0c1b0602cb6d0. 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 988,1023:src/cli/workspace.rs.