History of Ripples::step 1 change

In crates/backdrop/src/ripples.rs, lines 176–182 on 97b18869acf56b26684db983c1feea231157a7a1f11c42b2098e71080c934344. 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 176,182:crates/backdrop/src/ripples.rs.