History of ReferenceIndex::indexOf 1 change

In src/references.ts, lines 54–81 on 1cc0ff44e5ca78b9abfb50f6c09a66f35f3575423f9bc5a3de2d0d2e139fb712. 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.