History of Field::light 1 change

In crates/backdrop/src/field.rs, lines 96–122 on 668b2ad7495ce300ca09b4436b280dfd9a141febdf0f93ee420ac08c9f9b6fd5. 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 96,122:crates/backdrop/src/field.rs.