History of Colour::label 1 change

In crates/hub/src/diffusion.rs, lines 232–241 on 58f915792b8586ea1868ad207069e7e80a59e15a5e2aa3299cbf9ab450e25aab. 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 232,241:crates/hub/src/diffusion.rs.