History of rgba 1 change

In crates/hub/tests/contrast.rs, lines 78–85 on b644e1757711b8dc1e800847526486c53bad3094fdcc2c5c8fc8beb347282570. 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 78,85:crates/hub/tests/contrast.rs.