History of proposal 6 changes

In crates/oh/src/main.rs, lines 764–901 on 71e65fcf95ab37246392ea0013ba4b53be8a9b804b5887bd555b5cecb10a41fa. 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 764,901:crates/oh/src/main.rs.