History of plural 1 change

In src/cli/format.rs, lines 19–21 on edc16b3ab30f1d6327d64af533c0a4ae7180f521eaf4ef378a9e181e8d52ece9. 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 19,21:src/cli/format.rs.