History of checkpoint 4 changes

In src/cli/workspace.rs, lines 2001–2014 on b0621c2f8cc4e8ec87ce68b61be887253e92f15a66743d98450e039b2183996b. 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 2001,2014:src/cli/workspace.rs.