well I prefer one line. But perhaps we can add \ escaping in the future. (actually the parser is still strange to me, I have to play with it more to understand it properly. While developing stop I named my subsubtest true,which cased a lot of troubles (as it was translated to True...). It's clever, but sometimes too much...

Also I had problems that (correct me if I'm wrong) the substitutions are only local. I set `stress_cmd = xxx` in subTestCaller and `cmd = "whatever ... %(stress_cmd)" in subTest, which resulted in KeyError....

Do you know of a way to specify stress_cmd in subTestCaller and then combine it in the subTest config with something else?