History of proposal 10 changes

In crates/oh/src/main.rs, lines 1573–1739 on 04f9c984439e1a49dbbbb32a47ebf0fab4279fe7a4cc03f2a798f5e620725c58. 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 1573,1739:crates/oh/src/main.rs.