History of schemas 4 changes

In crates/hub-api/src/lib.rs, lines 635–687 on 941abdd6bb4c4c2de60cefa9d636544366d4333ea220564292247fa1575b39e8. 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.