History of plural 1 change

In src/cli/format.rs, lines 13–15 on b8a0399319fc9b989db780bb5ddbbfea659c23d57aaac890c5541780b235fe48. 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.