History of err 1 change

In src/cli/ui.rs, lines 187–189 on 4fe7d6045860322e1cd8b25ce58bce21220d9f0500a8648b7f59dac577683236. 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.