History of gc 9 changes

In src/cli/workspace.rs, lines 1825–1889 on a42f9fb47e372ab21e8cd0ae30848c76d031e43dca3c50d276f33b5ada337605. 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 1825,1889:src/cli/workspace.rs.