History of gc 3 changes

In src/cli/workspace.rs, lines 612–635 on c6aa5bd9d1c878baa11e43d6b1e10e95b848f6fce079fcf8b74fadba2b2930e0. 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 612,635:src/cli/workspace.rs.