History of main 8 changes

In src/main.rs, lines 8–22 on 83e0677b07fe8dc95dd42ab6c00760d520decd6ac3a3761134edfa8bf028b0c3. 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 8,22:src/main.rs.