History of start 3 changes

In crates/backdrop/src/lib.rs, lines 266–384 on 03bfb945f5c1802fccb5e2b81155f569b5ea76039bf4f747cf3be08a8e27d458. 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 266,384:crates/backdrop/src/lib.rs.