History of deepen 3 changes

In src/cli/sync.rs, lines 845–867 on b35df36b7dc57fcce2bf0fadde6a12c5d0e2fc4da06f0f4ebb6b46637dc01df1. 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 845,867:src/cli/sync.rs.