History of proposal 6 changes

In crates/oh/src/main.rs, lines 910–1047 on v0.5.2. 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 910,1047:crates/oh/src/main.rs.