History of extract 1 change

In src/cpu/extract.py, lines 16–20 on 51099110490bc0783baaa968ce376efa2a527a579f603f1faa563715dc437d60. 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 16,20:src/cpu/extract.py.