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As run_commandf() is variadic version of run_command() and just a wrapper, hence apply similar run_command's test-cases. Let's avoid warning about empty string passing: warning: zero-length gnu_printf format string [-Wformat-zero-length] assert(run_commandf("") == 0); Signed-off-by: Evgeny Bachinin <EABachinin@sberdevices.ru> Reviewed-by: Simon Glass <sjg@chromium.org>
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