History of extract 1 change

In src/cpu/extract.py, lines 16–20 on 9120e87480a65aa6063a8292fe68f2f7ab935e4368042bb93bb702ccb3a7c4f9. 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.