Assert a command (built with program and args) stdout string is not equal to an expression.
let program = "bin/printf-stdout"; let args = ["%s", "hello"]; let s = String::from("zzz"); assert_program_args_stdout_ne_expr!(&program, &args, s);
assert_program_args_stdout_ne_expr
assert_program_args_stdout_ne_expr_as_result
debug_assert_program_args_stdout_ne_expr