History of gc 3 changes

In src/cli/workspace.rs, lines 261–284 on 4dee277c327ae9e908daff85af60474484fb0ccbc9fdf4262a754b607aa3e6f9. 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 261,284:src/cli/workspace.rs.