History of gc 3 changes

In src/cli/workspace.rs, lines 199–222 on 2863456a0f6d96a6b04f7892b73d0665ff71ad94d14e2824726a9224f679537a. 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.