History of main 11 changes

In src/main.rs, lines 12–39 on 19527875ebdc04f181f5283fed0256f3b7d588531f9c096489eae397aff944cc. 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 12,39:src/main.rs.