History of ReferenceIndex::indexOf 1 change

In src/references.ts, lines 54–81 on 85a87a2d7d5b58b2bf802d71a022daebe47c9e5c5fd55b9f47e6d288303abf49. 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 54,81:src/references.ts.