History of rgba 1 change

In crates/hub/tests/contrast.rs, lines 78–85 on ab4df6aae179d6956437423a453c9b4f0fecab758c186b841557059162d58cb5. 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.