History of extract 1 change

In src/cpu/extract.py, lines 16–20 on 8e8d9cad1884b197145a28d2a55bd2177ebeeeeec53e08cbe03e6388bcb80519. 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.