History of serve 4 changes

In src/cli/sync.rs, lines 720–748 on 4275ecb110f5f396f4d5ff451252fd70877c9ab59ac848206ad314025e76d6e2. 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 720,748:src/cli/sync.rs.