History of SelfTest::test_mem 1 change

In testbench/selftest.py, lines 28–51 on rrdc-perf. 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 28,51:testbench/selftest.py.