History of X16TestBench::__tohex16 1 change

In testbench/testbench.py, lines 82–86 on main. 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 82,86:testbench/testbench.py.