History of keep 4 changes

In crates/hub/src/coverage.rs, lines 463–517 on 2cbf6f348595a76d5d26de2df8f3c15859e9425ee879b07f3ae1c7116bf4e8e9. 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 463,517:crates/hub/src/coverage.rs.