The hush parser not enabled for some boards, e.g.
sipeed_maix_bitm_defconfig.
With CONFIG_HUSH_PARSER=n a double quotation mark is not interpreted as the
beginning of a string. Use a single quotation mark instead.
Furthermore without the hush parser variables have to be referenced as
${varname}. Add the missing braces.
Reported-by: Sean Anderson <seanga2@gmail.com>
Fixes: 8b86c609b860 ("test/py: add test of basic shell functionality")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
acb021e48c