History of main 10 changes

In src/main.rs, lines 12–29 on 1e0fbb47ab9095d74947be7214dd0099540961dbd6eb564687669439a873c0ba+87c948720343629fc6727793e820b56557c7fe7ec603b45bdd36a8e07d04a693+8d80356371c5573ae038724d4adec6f3835e1d265c75ac1d9c7a0c82c49f2724. 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.