History of extract 1 change

In src/cpu/extract.py, lines 16–20 on ea9efff4e5406b975d308d34a1f8ea123381cce12ed7b5f80fac3cae8792d2c3. 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.