History of finish 3 changes

In crates/oxy-strata/src/aws.rs, lines 191–220 on a42f9fb47e372ab21e8cd0ae30848c76d031e43dca3c50d276f33b5ada337605. 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 191,220:crates/oxy-strata/src/aws.rs.