History of deepen 2 changes

In src/cli/sync.rs, lines 680–702 on dedcf5da07fc45bac7a794720a4a202600c141cdf9f5769443bb2767df180f83. 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 680,702:src/cli/sync.rs.