History of err 1 change

In src/cli/ui.rs, lines 187–189 on bd9414401fdcf3c5bb8073bf523139d1d6270ac1389519fc8ac7485882ad005c. 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.