History of schemas 4 changes

In crates/hub-api/src/lib.rs, lines 635–687 on e1ec9fbf538eea2cedb1c7ae7b4cb6f4f7a83d1d5b9e310a061892892295f330. 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.