History of gc 6 changes

In src/cli/workspace.rs, lines 1598–1633 on e8e6e0cac26a5b4ee156d90a2c9f3879916a89737ebaeb0acbbd98e86366cccb. 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 1598,1633:src/cli/workspace.rs.