History of main 1 change

In crates/jet/examples/scan.rs, lines 1–20 on 1217af4847adac5b4bad79208216ec1d39d377347ee7ed3454f06dd2233cfd49. 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.