History of gc 3 changes

In src/cli/workspace.rs, lines 199–222 on 0bb9413f0118b6ad6276634b205455db9ea7900a73b2497eb854883ca0bb667a. 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 199,222:src/cli/workspace.rs.