History of deepen 3 changes

In src/cli/sync.rs, lines 848–870 on a46f3e4f50b1899b5e7b404baf4ae8f4a396d496bb822a900eb922b5b312bd74. 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.