History of main 10 changes

In src/main.rs, lines 12–29 on 045340293dc769e20918184984a2a99a12c9bd4ce37ad58ad1b0fa7b166ff0a6. 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 12,29:src/main.rs.