History of X16TestBench::__tohex16 1 change

In testbench/testbench.py, lines 82–86 on 8799a5e4565e56cd4e16934ba0ebbf365f5d7dd4a291f2eb90095f5f17efbd9a. 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.