History of Mark::label 1 change

In crates/backdrop/src/mark.rs, lines 114–116 on ed3a36b6414c28f923e71384afe4dc78a7541ea98e95a2af640cfd46ed92fd77. 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 114,116:crates/backdrop/src/mark.rs.