History of main 1 change

In crates/jet/examples/scan.rs, lines 1–20 on 5db09ccf23ab548976baca9ec6d610eca6a38d5054570e67f2d112da26c760e3. 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.