History of switch 1 change

In crates/oh/src/main.rs, lines 1001–1009 on v0.9.21. 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 1001,1009:crates/oh/src/main.rs.