History of start 3 changes

In crates/backdrop/src/lib.rs, lines 266–384 on 62cdf34daec16747d6b0ff9afff338b14420b7fb80a9d9dfd00c00550db1b7ec. 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.