History of tests::tree 1 change

In crates/flow/src/cache.rs, lines 678–684 on 8a4f5174526a58cc31b020871e52b8ff84f7fc3f5a2b544ff7b65db27c997a89. 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 678,684:crates/flow/src/cache.rs.