History of SelfTest::test_negativeflag 1 change

In testbench/selftest.py, lines 199–221 on 35bd422c903281cc261aa568b0d6fc798d6257121c49444ae49b760750922384. 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 199,221:testbench/selftest.py.