History of main 1 change

In crates/jet/examples/scan.rs, lines 1–20 on cc462b56fbbb935df73234cf7ae0ac8de8a839549a4aa7aa26d4b2d038edbc12. 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 1,20:crates/jet/examples/scan.rs.