History of label 3 changes

In crates/oh/src/main.rs, lines 1634–1665 on d7050703d2f4c830367a32398629c87fe74160c58d1937c32b71eb313d29517f. 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 1634,1665:crates/oh/src/main.rs.