History of main 10 changes

In src/main.rs, lines 12–29 on 1e0fbb47ab9095d74947be7214dd0099540961dbd6eb564687669439a873c0ba. 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.