History of plural 1 change

In src/cli/format.rs, lines 15–17 on 8b53b935dd0366dba212be45bf9e10486f84aaf660f39c6b88c47cca89e6a8b2. 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.