History of plural 1 change

In src/cli/format.rs, lines 15–17 on 0389c3e82f6c6455a70b858706018bb1df88650071b8ec0c1471831ada895686. 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 15,17:src/cli/format.rs.