History of gc 3 changes

In src/cli/workspace.rs, lines 199–222 on 135212de5370ab32bf3501985a41667bb087f10dec75ffea2c37fea92be69542. 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.