History of Field::label 1 change

In crates/backdrop/src/field.rs, lines 176–187 on 8aa5ef384ef18424402f7417566ca62c03326a2769205b694d4a07f55e7c6a5b. 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 176,187:crates/backdrop/src/field.rs.