History of deepen 3 changes

In src/cli/sync.rs, lines 848–870 on 8d80356371c5573ae038724d4adec6f3835e1d265c75ac1d9c7a0c82c49f2724. 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.