History of rgba 1 change

In crates/hub/tests/contrast.rs, lines 78–85 on b7d2b0b30b4ac9cf296a69413edcb0026af40ab263445dae89ecdb5030307526. 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.