History of project 6 changes

In crates/oh/src/main.rs, lines 1746–1912 on fbd7c85519324ebee2c30a7913f15c859463f75c032a9a3259191e6bc08b76b6. 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 1746,1912:crates/oh/src/main.rs.