History of release 3 changes

In crates/oh/src/main.rs, lines 2012–2103 on 946fe7a09faac0e57edbde6c7e68444d0ada282ddf8658f94d9a2f59bba4bb5f. 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.