History of Field::point 1 change

In crates/backdrop/src/field.rs, lines 90–93 on v0.9.15. 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 90,93:crates/backdrop/src/field.rs.