History of proposal 10 changes

In crates/oh/src/main.rs, lines 1500–1666 on 806615f974c0ff0cc209e8a964fead304496332b89ff38e2f1de4a1b11481e9c. 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 1500,1666:crates/oh/src/main.rs.