patch 8.2.1062: Vim9: no line break allowed inside "cond ? val1 : val2"

Problem:    Vim9: no line break allowed inside "cond ? val1 : val2".
Solution:   Check for operator after line break.
diff --git a/src/eval.c b/src/eval.c
index 0402b36..fe53632 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1892,13 +1892,17 @@
     int
 eval1(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
 {
+    char_u  *p;
+    int	    getnext;
+
     /*
      * Get the first variable.
      */
     if (eval2(arg, rettv, evalarg) == FAIL)
 	return FAIL;
 
-    if ((*arg)[0] == '?')
+    p = eval_next_non_blank(*arg, evalarg, &getnext);
+    if (*p == '?')
     {
 	int		result;
 	typval_T	var2;
@@ -1906,6 +1910,9 @@
 	int		orig_flags;
 	int		evaluate;
 
+	if (getnext)
+	    *arg = eval_next_line(evalarg);
+
 	if (evalarg == NULL)
 	{
 	    CLEAR_FIELD(nested_evalarg);
@@ -1942,13 +1949,16 @@
 	/*
 	 * Check for the ":".
 	 */
-	if ((*arg)[0] != ':')
+	p = eval_next_non_blank(*arg, evalarg, &getnext);
+	if (*p != ':')
 	{
 	    emsg(_(e_missing_colon));
 	    if (evaluate && result)
 		clear_tv(rettv);
 	    return FAIL;
 	}
+	if (getnext)
+	    *arg = eval_next_line(evalarg);
 
 	/*
 	 * Get the third variable.  Recursive!