History of plural 1 change

In src/cli/format.rs, lines 13–15 on a269bee11bb211a49e72d6d24c2218512589a2ac4780eb0bb3d8c88f4593353f. 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 13,15:src/cli/format.rs.