patch 8.2.3232: system() does not work without a second argument
Problem: system() does not work without a second argument.
Solution: Do not require a second argument. (Yegappan Lakshmanan,
closes #8651, closes #8650)
diff --git a/src/misc1.c b/src/misc1.c
index e66f5a8..7d7f022 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -2359,7 +2359,7 @@
if (in_vim9script()
&& (check_for_string_arg(argvars, 0) == FAIL
- || check_for_string_or_number_or_list_arg(argvars, 1) == FAIL))
+ || check_for_opt_string_or_number_or_list_arg(argvars, 1) == FAIL))
return;
if (argvars[1].v_type != VAR_UNKNOWN)