History of proposal 10 changes

In crates/oh/src/main.rs, lines 1500–1666 on fac6853c4e46a6c9edfcb845d0fb6480cfa4f57b89ab374db1a1dd264643d689. 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.