History of plural 1 change

In src/cli/format.rs, lines 18–20 on 2863456a0f6d96a6b04f7892b73d0665ff71ad94d14e2824726a9224f679537a. 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 18,20:src/cli/format.rs.