History of plural 1 change

In src/cli/format.rs, lines 15–17 on 642da2636de23fd2aee00ace74e1ec4abace8241fb73d3f30519be0fdc1d4c8c. 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.