History of release 3 changes

In crates/oh/src/main.rs, lines 2012–2103 on faf5246c900e9ff6804832bff4ab4fc8188bad6a7220901e6209658ac70261c8. 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 2012,2103:crates/oh/src/main.rs.