History of witnesses 2 changes

In crates/hub/src/tlog.rs, lines 782–786 on api-unknown-fields. 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 782,786:crates/hub/src/tlog.rs.