History of deepen 3 changes

In src/cli/sync.rs, lines 848–870 on 69953b507188dff068d3b68e03ab3816bb3ee588793b9b07e1ab66c27eeb38a5. 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 848,870:src/cli/sync.rs.