History of err 1 change

In src/cli/ui.rs, lines 187–189 on 8c30d814f2cc6160bd620a48f70c002991c2ef13fa46565a77151c2854b0c13d. 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 187,189:src/cli/ui.rs.