History of run 7 changes

In crates/oh/src/main.rs, lines 623–711 on 559c392042340dc03180c163b407dd81c2f042df30441918b4254b482e7b3b64. 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 623,711:crates/oh/src/main.rs.