History of plural 1 change

In src/cli/format.rs, lines 18–20 on 4e88e774777a64094484bd051a12ad247db4ab1584584e82aee18c55ecb34862. 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 18,20:src/cli/format.rs.