History of pack 2 changes

In crates/cylinder/src/lib.rs, lines 136–179 on v0.9.0. 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 136,179:crates/cylinder/src/lib.rs.