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.

src/eval.c

@@ -1892,13 +1892,17 @@ eval0(
     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 @@ eval1(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
 	int		orig_flags;
 	int		evaluate;
 
+	if (getnext)
+	    *arg = eval_next_line(evalarg);
+
 	if (evalarg == NULL)
 	{
 	    CLEAR_FIELD(nested_evalarg);
@@ -1942,13 +1949,16 @@ eval1(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
 	/*
 	 * 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!

src/testdir/test_vim9_expr.vim

@@ -45,6 +45,27 @@ def Test_expr1()
   assert_equal(function('len'), RetThat)
 enddef
 
+def Test_expr1_vimscript()
+  " only checks line continuation
+  let lines =<< trim END
+      vim9script
+      let var = 1
+      		? 'yes'
+		: 'no'
+      assert_equal('yes', var)
+  END
+  CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+      let var = v:false
+      		? 'yes'
+		: 'no'
+      assert_equal('no', var)
+  END
+  CheckScriptSuccess(lines)
+enddef
+
 func Test_expr1_fails()
   call CheckDefFailure(["let x = 1 ? 'one'"], "Missing ':' after '?'")
   call CheckDefFailure(["let x = 1 ? 'one' : xxx"], "E1001:")

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1062,
 /**/
     1061,
 /**/