History of undo 1 change

In src/extension.ts, lines 539–560 on 196392053c9f742e9981f5fb9da6cfcb90963b8dcf0a551fee71f4e1e3885706. 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 539,560:src/extension.ts.