History of schemas 4 changes

In crates/hub-api/src/lib.rs, lines 635–687 on 1966661b1880eb65b7662730b9e609f06d0cbe16dddba1e9a8be8599f5296079. 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 635,687:crates/hub-api/src/lib.rs.